| 1 | C31×#2442 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 2 | C31×#2361 | C2 | 1 | 1 | yes | maximal, characteristic |
| 3 | C31×#2101 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 4 | C31×#2087 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 5 | C31×#2067 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 6 | C31×#2025 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 7 | C31×#1989 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 8 | C31×#1921 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 9 | C31×#1893 | C2 | 1 | 1 | yes | maximal, characteristic |
| 10 | C31×#1874 | C2 | 1 | 1 | yes | maximal, characteristic |
| 11 | C31×#1862 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 12 | C31×#1852 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 13 | C31×#1850 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 14 | C31×#1804 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 15 | C2×C31×#340 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 16 | C23×C8×C31 | C22 | 1 | 1 | yes | characteristic |
| 17 | C2×C31×#125 | C22 | 1 | 1 | yes | characteristic |
| 18 | C2×C31×#121 | C22 | 1 | 1 | yes | characteristic |
| 19 | C2×C4×D4×C31 | — | 2 | 1 | no | — |
| 20 | C2×C4×D4×C31 | C22 | 1 | 1 | yes | characteristic |
| 21 | C22×C4⋊C4×C31 | C22 | 1 | 1 | yes | characteristic |
| 22 | C22×C4⋊C4×C31 | C22 | 1 | 1 | yes | characteristic |
| 23 | C2×C31×#107 | C22 | 1 | 1 | yes | characteristic |
| 24 | C2×C31×#107 | C22 | 1 | 1 | yes | characteristic |
| 25 | C2×C31×C4⋊C8 | C22 | 1 | 1 | yes | characteristic |
| 26 | C2×C31×C4⋊C8 | C22 | 1 | 1 | yes | characteristic |
| 27 | C2×C31×#102 | C22 | 1 | 1 | yes | characteristic |
| 28 | C2×C31×#102 | C22 | 1 | 1 | yes | characteristic |
| 29 | C2×C31×#102 | C22 | 1 | 1 | yes | characteristic |
| 30 | C2×C31×#102 | C22 | 1 | 1 | yes | characteristic |
| 31 | C2×C31×C22⋊C8 | C22 | 1 | 1 | yes | characteristic |
| 32 | C31×#400 | — | 2 | 1 | no | — |
| 33 | C31×#398 | — | 2 | 1 | no | — |
| 34 | C31×#390 | C22 | 1 | 1 | yes | characteristic |
| 35 | C31×#389 | C22 | 1 | 1 | yes | characteristic |
| 36 | C31×#389 | C22 | 1 | 1 | yes | characteristic |
| 37 | C31×#389 | C22 | 1 | 1 | yes | characteristic |
| 38 | C31×#388 | — | 2 | 1 | no | — |
| 39 | C31×#386 | — | 2 | 1 | no | — |
| 40 | C31×#385 | — | 2 | 1 | no | — |
| 41 | C31×#385 | — | 2 | 1 | no | — |
| 42 | C31×#382 | C22 | 1 | 1 | yes | characteristic |
| 43 | C31×#380 | — | 2 | 1 | no | — |
| 44 | C31×#380 | C22 | 1 | 1 | yes | characteristic |
| 45 | C4×C4⋊C4×C31 | C22 | 1 | 1 | yes | characteristic |
| 46 | C4×C22⋊C4×C31 | C22 | 1 | 1 | yes | characteristic |
| 47 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 48 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 49 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 50 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 51 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 52 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 53 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 54 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 55 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 56 | C31×#340 | C22 | 1 | 1 | yes | characteristic |
| 57 | C31×#336 | C22 | 1 | 1 | yes | characteristic |
| 58 | C31×#336 | C22 | 1 | 1 | yes | characteristic |
| 59 | C22×D4×C31 | — | 2 | 1 | no | — |
| 60 | C22×D4×C31 | C23 | 1 | 1 | yes | characteristic |
| 61 | C23×C4×C31 | — | 2 | 1 | no | — |
| 62 | C23×C4×C31 | — | 2 | 1 | no | — |
| 63 | C23×C4×C31 | — | 2 | 1 | no | — |
| 64 | C23×C4×C31 | C23 | 1 | 1 | yes | characteristic |
| 65 | C22×C8×C31 | — | 2 | 2 | no | — |
| 66 | C22×C8×C31 | — | 4 | 1 | no | — |
| 67 | C22×C8×C31 | — | 4 | 1 | no | — |
| 68 | C22×C8×C31 | C23 | 1 | 1 | yes | characteristic |
| 69 | C22×C8×C31 | C23 | 1 | 1 | yes | characteristic |
| 70 | C22×C8×C31 | C23 | 1 | 1 | yes | characteristic |
| 71 | C22×C8×C31 | C23 | 1 | 1 | yes | characteristic |
| 72 | C31×#125 | — | 2 | 2 | no | — |
| 73 | C31×#125 | — | 4 | 1 | no | — |
| 74 | C31×#121 | — | 2 | 2 | no | — |
| 75 | C31×#121 | Q8 | 1 | 4 | yes | — |
| 76 | C4×D4×C31 | — | 2 | 2 | no | — |
| 77 | C4×D4×C31 | — | 4 | 1 | no | — |
| 78 | C4×D4×C31 | — | 4 | 4 | no | — |
| 79 | C2×C4⋊C4×C31 | — | 2 | 2 | no | — |
| 80 | C2×C4⋊C4×C31 | — | 2 | 2 | no | — |
| 81 | C2×C4⋊C4×C31 | — | 2 | 1 | no | — |
| 82 | C2×C4⋊C4×C31 | — | 2 | 1 | no | — |
| 83 | C2×C4⋊C4×C31 | — | 2 | 1 | no | — |
| 84 | C2×C4⋊C4×C31 | — | 2 | 1 | no | — |
| 85 | C2×C4⋊C4×C31 | — | 2 | 1 | no | — |
| 86 | C2×C4⋊C4×C31 | — | 2 | 1 | no | — |
| 87 | C2×C4⋊C4×C31 | — | 2 | 1 | no | — |
| 88 | C2×C4⋊C4×C31 | — | 4 | 1 | no | — |
| 89 | C2×C4⋊C4×C31 | — | 4 | 1 | no | — |
| 90 | C2×C4⋊C4×C31 | C23 | 1 | 1 | yes | characteristic |
| 91 | C2×C4⋊C4×C31 | C23 | 1 | 1 | yes | characteristic |
| 92 | C2×C4⋊C4×C31 | C23 | 1 | 1 | yes | characteristic |
| 93 | C2×C4⋊C4×C31 | C23 | 1 | 1 | yes | characteristic |
| 94 | C2×C4⋊C4×C31 | C23 | 1 | 1 | yes | characteristic |
| 95 | C2×C4⋊C4×C31 | C23 | 1 | 1 | yes | characteristic |
| 96 | C2×C4⋊C4×C31 | C23 | 1 | 1 | yes | characteristic |
| 97 | C2×C22⋊C4×C31 | — | 2 | 1 | no | — |
| 98 | C2×C22⋊C4×C31 | — | 2 | 1 | no | — |
| 99 | C2×C22⋊C4×C31 | — | 2 | 1 | no | — |
| 100 | C2×C22⋊C4×C31 | — | 2 | 1 | no | — |
| 101 | C2×C22⋊C4×C31 | — | 2 | 1 | no | — |
| 102 | C2×C22⋊C4×C31 | D4 | 1 | 1 | yes | characteristic |
| 103 | C2×C22⋊C4×C31 | D4 | 1 | 1 | yes | characteristic |
| 104 | C2×C42×C31 | — | 2 | 1 | no | — |
| 105 | C2×C42×C31 | C23 | 1 | 1 | yes | characteristic |
| 106 | C2×C42×C31 | C23 | 1 | 1 | yes | characteristic |
| 107 | C31×#107 | — | 2 | 2 | no | — |
| 108 | C31×#107 | — | 4 | 1 | no | — |
| 109 | C31×C4⋊C8 | — | 4 | 1 | no | — |
| 110 | C31×C4⋊C8 | — | 4 | 1 | no | — |
| 111 | C31×#102 | — | 2 | 2 | no | — |
| 112 | C31×#102 | — | 4 | 1 | no | — |
| 113 | C31×#102 | — | 4 | 1 | no | — |
| 114 | C31×#102 | — | 4 | 1 | no | — |
| 115 | C31×C22⋊C8 | — | 2 | 2 | no | — |
| 116 | C31×#95 | — | 2 | 1 | no | — |
| 117 | C31×#95 | — | 2 | 1 | no | — |
| 118 | C31×#95 | — | 2 | 1 | no | — |
| 119 | C31×#95 | — | 2 | 1 | no | — |
| 120 | C31×#95 | — | 2 | 1 | no | — |
| 121 | C31×#95 | — | 2 | 1 | no | — |
| 122 | C31×#95 | — | 2 | 1 | no | — |
| 123 | C31×#95 | D4 | 1 | 1 | yes | characteristic |
| 124 | C31×#95 | D4 | 1 | 1 | yes | characteristic |
| 125 | C24×C31 | — | 2 | 1 | no | — |
| 126 | C24×C31 | C2×D4 | 1 | 1 | yes | characteristic |
| 127 | C2×D4×C31 | — | 2 | 4 | no | — |
| 128 | C2×D4×C31 | — | 2 | 1 | no | — |
| 129 | C2×D4×C31 | — | 2 | 1 | no | — |
| 130 | C2×D4×C31 | — | 2 | 1 | no | — |
| 131 | C2×D4×C31 | — | 2 | 1 | no | — |
| 132 | C2×D4×C31 | — | 2 | 1 | no | — |
| 133 | C2×D4×C31 | — | 4 | 2 | no | — |
| 134 | C2×D4×C31 | — | 4 | 2 | no | — |
| 135 | C2×D4×C31 | C2×Q8 | 1 | 2 | yes | — |
| 136 | C22×C4×C31 | — | 2 | 1 | no | — |
| 137 | C22×C4×C31 | — | 2 | 1 | no | — |
| 138 | C22×C4×C31 | — | 2 | 1 | no | — |
| 139 | C22×C4×C31 | — | 2 | 1 | no | — |
| 140 | C22×C4×C31 | — | 2 | 1 | no | — |
| 141 | C22×C4×C31 | — | 2 | 1 | no | — |
| 142 | C22×C4×C31 | — | 2 | 1 | no | — |
| 143 | C22×C4×C31 | — | 2 | 1 | no | — |
| 144 | C22×C4×C31 | — | 2 | 1 | no | — |
| 145 | C22×C4×C31 | — | 2 | 1 | no | — |
| 146 | C22×C4×C31 | — | 2 | 1 | no | — |
| 147 | C22×C4×C31 | — | 4 | 2 | no | — |
| 148 | C22×C4×C31 | — | 4 | 2 | no | — |
| 149 | C22×C4×C31 | — | 4 | 2 | no | — |
| 150 | C22×C4×C31 | — | 4 | 2 | no | — |
| 151 | C22×C4×C31 | — | 4 | 2 | no | — |
| 152 | C22×C4×C31 | — | 4 | 2 | no | — |
| 153 | C22×C4×C31 | — | 8 | 1 | no | — |
| 154 | C22×C4×C31 | — | 8 | 1 | no | — |
| 155 | C22×C4×C31 | — | 8 | 1 | no | — |
| 156 | C22×C4×C31 | C2×D4 | 1 | 1 | yes | characteristic |
| 157 | C22×C4×C31 | C2×D4 | 1 | 1 | yes | characteristic |
| 158 | C22×C4×C31 | C2×D4 | 1 | 1 | yes | characteristic |
| 159 | C22×C4×C31 | C2×D4 | 1 | 1 | yes | characteristic |
| 160 | C22×C4×C31 | C2×D4 | 1 | 1 | yes | characteristic |
| 161 | C22×C4×C31 | C2×Q8 | 1 | 2 | yes | — |
| 162 | C22×C4×C31 | #41 | 1 | 2 | yes | — |
| 163 | C22×C4×C31 | C24 | 1 | 1 | yes | characteristic |
| 164 | C2×C8×C31 | — | 2 | 1 | no | — |
| 165 | C2×C8×C31 | — | 2 | 1 | no | — |
| 166 | C2×C8×C31 | — | 2 | 1 | no | — |
| 167 | C2×C8×C31 | — | 2 | 1 | no | — |
| 168 | C2×C8×C31 | — | 2 | 1 | no | — |
| 169 | C2×C8×C31 | — | 2 | 1 | no | — |
| 170 | C2×C8×C31 | — | 2 | 1 | no | — |
| 171 | C2×C8×C31 | — | 2 | 1 | no | — |
| 172 | C2×C8×C31 | — | 2 | 1 | no | — |
| 173 | C2×C8×C31 | — | 2 | 1 | no | — |
| 174 | C2×C8×C31 | — | 2 | 1 | no | — |
| 175 | C2×C8×C31 | — | 2 | 1 | no | — |
| 176 | C2×C8×C31 | — | 4 | 4 | no | — |
| 177 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 178 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 179 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 180 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 181 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 182 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 183 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 184 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 185 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 186 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 187 | C4⋊C4×C31 | — | 2 | 1 | no | — |
| 188 | C4⋊C4×C31 | — | 4 | 2 | no | — |
| 189 | C4⋊C4×C31 | — | 4 | 2 | no | — |
| 190 | C4⋊C4×C31 | — | 4 | 2 | no | — |
| 191 | C4⋊C4×C31 | — | 4 | 2 | no | — |
| 192 | C4⋊C4×C31 | — | 4 | 2 | no | — |
| 193 | C4⋊C4×C31 | — | 8 | 1 | no | — |
| 194 | C4⋊C4×C31 | — | 8 | 1 | no | — |
| 195 | C4⋊C4×C31 | C2×Q8 | 1 | 2 | yes | — |
| 196 | C4⋊C4×C31 | #41 | 1 | 2 | yes | — |
| 197 | C4⋊C4×C31 | #41 | 1 | 2 | yes | — |
| 198 | C22⋊C4×C31 | — | 2 | 2 | no | — |
| 199 | C22⋊C4×C31 | — | 2 | 2 | no | — |
| 200 | C22⋊C4×C31 | — | 2 | 4 | no | — |
| 201 | C22⋊C4×C31 | — | 4 | 2 | no | — |
| 202 | C22⋊C4×C31 | — | 4 | 2 | no | — |
| 203 | C22⋊C4×C31 | — | 4 | 2 | no | — |
| 204 | C22⋊C4×C31 | — | 8 | 1 | no | — |
| 205 | C42×C31 | — | 2 | 1 | no | — |
| 206 | C42×C31 | — | 2 | 1 | no | — |
| 207 | C42×C31 | — | 2 | 1 | no | — |
| 208 | C42×C31 | — | 2 | 1 | no | — |
| 209 | C42×C31 | — | 4 | 2 | no | — |
| 210 | #26420 | C31 | 1 | 1 | yes | maximal, characteristic, direct product factor, Sylow |
| 211 | C23×C31 | — | 2 | 1 | no | — |
| 212 | C23×C31 | — | 2 | 1 | no | — |
| 213 | C23×C31 | — | 2 | 1 | no | — |
| 214 | C23×C31 | — | 2 | 1 | no | — |
| 215 | C23×C31 | — | 2 | 2 | no | — |
| 216 | C23×C31 | — | 4 | 1 | no | — |
| 217 | C23×C31 | — | 4 | 1 | no | — |
| 218 | C23×C31 | — | 4 | 1 | no | — |
| 219 | C23×C31 | — | 4 | 1 | no | — |
| 220 | C23×C31 | — | 4 | 1 | no | — |
| 221 | C23×C31 | — | 4 | 1 | no | — |
| 222 | C23×C31 | C22⋊Q8 | 1 | 2 | yes | — |
| 223 | C23×C31 | #135 | 1 | 2 | yes | — |
| 224 | C23×C31 | AGL(1,ℤ/8) | 1 | 2 | yes | — |
| 225 | C23×C31 | C22×D4 | 1 | 1 | yes | characteristic |
| 226 | D4×C31 | — | 2 | 2 | no | — |
| 227 | D4×C31 | — | 2 | 2 | no | — |
| 228 | D4×C31 | — | 4 | 8 | no | — |
| 229 | D4×C31 | — | 4 | 1 | no | — |
| 230 | D4×C31 | — | 4 | 1 | no | — |
| 231 | C2×C4×C31 | — | 2 | 1 | no | — |
| 232 | C2×C4×C31 | — | 2 | 1 | no | — |
| 233 | C2×C4×C31 | — | 2 | 2 | no | — |
| 234 | C2×C4×C31 | — | 2 | 2 | no | — |
| 235 | C2×C4×C31 | — | 2 | 2 | no | — |
| 236 | C2×C4×C31 | — | 2 | 2 | no | — |
| 237 | C2×C4×C31 | — | 2 | 2 | no | — |
| 238 | C2×C4×C31 | — | 2 | 1 | no | — |
| 239 | C2×C4×C31 | — | 2 | 1 | no | — |
| 240 | C2×C4×C31 | — | 2 | 1 | no | — |
| 241 | C2×C4×C31 | — | 2 | 1 | no | — |
| 242 | C2×C4×C31 | — | 2 | 2 | no | — |
| 243 | C2×C4×C31 | — | 2 | 2 | no | — |
| 244 | C2×C4×C31 | — | 2 | 1 | no | — |
| 245 | C2×C4×C31 | — | 2 | 1 | no | — |
| 246 | C2×C4×C31 | — | 2 | 1 | no | — |
| 247 | C2×C4×C31 | — | 2 | 1 | no | — |
| 248 | C2×C4×C31 | — | 2 | 1 | no | — |
| 249 | C2×C4×C31 | — | 2 | 1 | no | — |
| 250 | C2×C4×C31 | — | 2 | 1 | no | — |
| 251 | C2×C4×C31 | — | 2 | 1 | no | — |
| 252 | C2×C4×C31 | — | 4 | 1 | no | — |
| 253 | C2×C4×C31 | — | 4 | 1 | no | — |
| 254 | C2×C4×C31 | — | 4 | 1 | no | — |
| 255 | C2×C4×C31 | — | 4 | 1 | no | — |
| 256 | C2×C4×C31 | — | 4 | 1 | no | — |
| 257 | C2×C4×C31 | — | 4 | 1 | no | — |
| 258 | C2×C4×C31 | — | 4 | 1 | no | — |
| 259 | C2×C4×C31 | — | 4 | 1 | no | — |
| 260 | C2×C4×C31 | — | 4 | 1 | no | — |
| 261 | C2×C4×C31 | — | 4 | 1 | no | — |
| 262 | C2×C4×C31 | — | 4 | 1 | no | — |
| 263 | C2×C4×C31 | — | 4 | 1 | no | — |
| 264 | C2×C4×C31 | — | 4 | 1 | no | — |
| 265 | C2×C4×C31 | — | 4 | 1 | no | — |
| 266 | C2×C4×C31 | — | 4 | 1 | no | — |
| 267 | C2×C4×C31 | — | 4 | 1 | no | — |
| 268 | C2×C4×C31 | — | 4 | 1 | no | — |
| 269 | C2×C4×C31 | — | 4 | 1 | no | — |
| 270 | C2×C4×C31 | — | 8 | 4 | no | — |
| 271 | C2×C4×C31 | — | 8 | 4 | no | — |
| 272 | C2×C4×C31 | — | 8 | 4 | no | — |
| 273 | C2×C4×C31 | C22⋊Q8 | 1 | 2 | yes | — |
| 274 | C2×C4×C31 | C22×Q8 | 1 | 1 | yes | characteristic |
| 275 | C2×C4×C31 | C2×#41 | 1 | 1 | yes | characteristic |
| 276 | C2×C4×C31 | C2×#41 | 1 | 1 | yes | characteristic |
| 277 | C2×C4×C31 | C2×#41 | 1 | 1 | yes | characteristic |
| 278 | C2×C4×C31 | H(5,𝔽2) | 1 | 1 | yes | characteristic |
| 279 | C2×C4×C31 | H(5,𝔽2) | 1 | 1 | yes | characteristic |
| 280 | C8×C31 | — | 4 | 1 | no | — |
| 281 | C8×C31 | — | 4 | 1 | no | — |
| 282 | C8×C31 | — | 4 | 1 | no | — |
| 283 | C8×C31 | — | 4 | 1 | no | — |
| 284 | #2442 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 285 | #2361 | C2×C31 | 1 | 1 | yes | characteristic |
| 286 | #2101 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 287 | #2087 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 288 | #2067 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 289 | #2025 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 290 | #1989 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 291 | #1921 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 292 | #1893 | C2×C31 | 1 | 1 | yes | characteristic |
| 293 | #1874 | C2×C31 | 1 | 1 | yes | characteristic |
| 294 | #1862 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 295 | #1852 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 296 | #1850 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 297 | #1804 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 298 | C2×#340 | C2×C31 | 1 | 1 | yes | characteristic, complemented |
| 299 | C22×C31 | — | 2 | 2 | no | — |
| 300 | C22×C31 | — | 2 | 2 | no | — |
| 301 | C22×C31 | — | 2 | 2 | no | — |
| 302 | C22×C31 | — | 2 | 2 | no | — |
| 303 | C22×C31 | — | 2 | 2 | no | — |
| 304 | C22×C31 | — | 2 | 2 | no | — |
| 305 | C22×C31 | — | 4 | 2 | no | — |
| 306 | C22×C31 | — | 4 | 2 | no | — |
| 307 | C22×C31 | — | 4 | 2 | no | — |
| 308 | C22×C31 | — | 8 | 1 | no | — |
| 309 | C22×C31 | — | 8 | 1 | no | — |
| 310 | C22×C31 | — | 8 | 1 | no | — |
| 311 | C22×C31 | — | 8 | 1 | no | — |
| 312 | C22×C31 | #478 | 1 | 4 | yes | — |
| 313 | C22×C31 | C2×C22⋊Q8 | 1 | 1 | yes | characteristic |
| 314 | C22×C31 | #546 | 1 | 1 | yes | characteristic |
| 315 | C22×C31 | #546 | 1 | 1 | yes | characteristic |
| 316 | C22×C31 | C2×#135 | 1 | 1 | yes | characteristic |
| 317 | C22×C31 | C2×AGL(1,ℤ/8) | 1 | 1 | yes | characteristic |
| 318 | C22×C31 | #576 | 1 | 1 | yes | characteristic |
| 319 | C22×C31 | #578 | 1 | 1 | yes | characteristic |
| 320 | C4×C31 | — | 2 | 2 | no | — |
| 321 | C4×C31 | — | 4 | 2 | no | — |
| 322 | C4×C31 | — | 4 | 1 | no | — |
| 323 | C4×C31 | — | 4 | 2 | no | — |
| 324 | C4×C31 | — | 4 | 1 | no | — |
| 325 | C4×C31 | — | 4 | 1 | no | — |
| 326 | C4×C31 | — | 4 | 1 | no | — |
| 327 | C4×C31 | — | 4 | 2 | no | — |
| 328 | C4×C31 | — | 8 | 1 | no | — |
| 329 | C4×C31 | — | 8 | 1 | no | — |
| 330 | C4×C31 | — | 8 | 1 | no | — |
| 331 | C4×C31 | — | 8 | 1 | no | — |
| 332 | C4×C31 | #529 | 1 | 1 | yes | characteristic |
| 333 | C4×C31 | #538 | 1 | 1 | yes | characteristic |
| 334 | C4×C31 | #554 | 1 | 1 | yes | characteristic |
| 335 | C4×C31 | #554 | 1 | 1 | yes | characteristic |
| 336 | C23×C8 | C22×C31 | 1 | 1 | yes | characteristic |
| 337 | C2×#125 | C22×C31 | 1 | 1 | yes | characteristic |
| 338 | C2×#121 | C22×C31 | 1 | 1 | yes | characteristic |
| 339 | C2×C4×D4 | — | 2 | 1 | no | — |
| 340 | C2×C4×D4 | C22×C31 | 1 | 1 | yes | characteristic |
| 341 | C22×C4⋊C4 | C22×C31 | 1 | 1 | yes | characteristic |
| 342 | C22×C4⋊C4 | C22×C31 | 1 | 1 | yes | characteristic |
| 343 | C2×#107 | C22×C31 | 1 | 1 | yes | characteristic |
| 344 | C2×#107 | C22×C31 | 1 | 1 | yes | characteristic |
| 345 | C2×C4⋊C8 | C22×C31 | 1 | 1 | yes | characteristic |
| 346 | C2×C4⋊C8 | C22×C31 | 1 | 1 | yes | characteristic |
| 347 | C2×#102 | C22×C31 | 1 | 1 | yes | characteristic |
| 348 | C2×#102 | C22×C31 | 1 | 1 | yes | characteristic |
| 349 | C2×#102 | C22×C31 | 1 | 1 | yes | characteristic |
| 350 | C2×#102 | C22×C31 | 1 | 1 | yes | characteristic |
| 351 | C2×C22⋊C8 | C22×C31 | 1 | 1 | yes | characteristic |
| 352 | #400 | — | 2 | 1 | no | — |
| 353 | #398 | — | 2 | 1 | no | — |
| 354 | #390 | C22×C31 | 1 | 1 | yes | characteristic |
| 355 | #389 | C22×C31 | 1 | 1 | yes | characteristic |
| 356 | #389 | C22×C31 | 1 | 1 | yes | characteristic |
| 357 | #389 | C22×C31 | 1 | 1 | yes | characteristic |
| 358 | #388 | — | 2 | 1 | no | — |
| 359 | #386 | — | 2 | 1 | no | — |
| 360 | #385 | — | 2 | 1 | no | — |
| 361 | #385 | — | 2 | 1 | no | — |
| 362 | #382 | C22×C31 | 1 | 1 | yes | characteristic |
| 363 | #380 | — | 2 | 1 | no | — |
| 364 | #380 | C22×C31 | 1 | 1 | yes | characteristic |
| 365 | C4×C4⋊C4 | C22×C31 | 1 | 1 | yes | characteristic |
| 366 | C4×C22⋊C4 | C22×C31 | 1 | 1 | yes | characteristic |
| 367 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 368 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 369 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 370 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 371 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 372 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 373 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 374 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 375 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 376 | #340 | C22×C31 | 1 | 1 | yes | characteristic |
| 377 | #336 | C22×C31 | 1 | 1 | yes | characteristic |
| 378 | #336 | C22×C31 | 1 | 1 | yes | characteristic |
| 379 | C2×C31 | — | 2 | 4 | no | — |
| 380 | C2×C31 | — | 8 | 2 | no | — |
| 381 | C2×C31 | #2450 | 1 | 1 | yes | characteristic |
| 382 | C2×C31 | C2×#478 | 1 | 1 | yes | characteristic |
| 383 | C2×C31 | #3083 | 1 | 1 | yes | characteristic |
| 384 | C2×C31 | #3297 | 1 | 1 | yes | characteristic |
| 385 | C2×C31 | #3300 | 1 | 1 | yes | characteristic |
| 386 | C2×C31 | #3308 | 1 | 1 | yes | characteristic |
| 387 | C2×C31 | #3318 | 1 | 1 | yes | characteristic |
| 388 | C22×D4 | — | 2 | 1 | no | — |
| 389 | C22×D4 | C23×C31 | 1 | 1 | yes | characteristic |
| 390 | C23×C4 | — | 2 | 1 | no | — |
| 391 | C23×C4 | — | 2 | 1 | no | — |
| 392 | C23×C4 | — | 2 | 1 | no | — |
| 393 | C23×C4 | C23×C31 | 1 | 1 | yes | characteristic |
| 394 | C22×C8 | — | 2 | 2 | no | — |
| 395 | C22×C8 | — | 4 | 1 | no | — |
| 396 | C22×C8 | — | 4 | 1 | no | — |
| 397 | C22×C8 | C23×C31 | 1 | 1 | yes | characteristic |
| 398 | C22×C8 | C23×C31 | 1 | 1 | yes | characteristic |
| 399 | C22×C8 | C23×C31 | 1 | 1 | yes | characteristic |
| 400 | C22×C8 | C23×C31 | 1 | 1 | yes | characteristic |
| 401 | #125 | — | 2 | 2 | no | — |
| 402 | #125 | — | 4 | 1 | no | — |
| 403 | #121 | — | 2 | 2 | no | — |
| 404 | #121 | Q8×C31 | 1 | 4 | yes | — |
| 405 | C4×D4 | — | 2 | 2 | no | — |
| 406 | C4×D4 | — | 4 | 1 | no | — |
| 407 | C4×D4 | — | 4 | 4 | no | — |
| 408 | C2×C4⋊C4 | — | 2 | 2 | no | — |
| 409 | C2×C4⋊C4 | — | 2 | 2 | no | — |
| 410 | C2×C4⋊C4 | — | 2 | 1 | no | — |
| 411 | C2×C4⋊C4 | — | 2 | 1 | no | — |
| 412 | C2×C4⋊C4 | — | 2 | 1 | no | — |
| 413 | C2×C4⋊C4 | — | 2 | 1 | no | — |
| 414 | C2×C4⋊C4 | — | 2 | 1 | no | — |
| 415 | C2×C4⋊C4 | — | 2 | 1 | no | — |
| 416 | C2×C4⋊C4 | — | 2 | 1 | no | — |
| 417 | C2×C4⋊C4 | — | 4 | 1 | no | — |
| 418 | C2×C4⋊C4 | — | 4 | 1 | no | — |
| 419 | C2×C4⋊C4 | C23×C31 | 1 | 1 | yes | characteristic |
| 420 | C2×C4⋊C4 | C23×C31 | 1 | 1 | yes | characteristic |
| 421 | C2×C4⋊C4 | C23×C31 | 1 | 1 | yes | characteristic |
| 422 | C2×C4⋊C4 | C23×C31 | 1 | 1 | yes | characteristic |
| 423 | C2×C4⋊C4 | C23×C31 | 1 | 1 | yes | characteristic |
| 424 | C2×C4⋊C4 | C23×C31 | 1 | 1 | yes | characteristic |
| 425 | C2×C4⋊C4 | C23×C31 | 1 | 1 | yes | characteristic |
| 426 | C2×C22⋊C4 | — | 2 | 1 | no | — |
| 427 | C2×C22⋊C4 | — | 2 | 1 | no | — |
| 428 | C2×C22⋊C4 | — | 2 | 1 | no | — |
| 429 | C2×C22⋊C4 | — | 2 | 1 | no | — |
| 430 | C2×C22⋊C4 | — | 2 | 1 | no | — |
| 431 | C2×C22⋊C4 | D4×C31 | 1 | 1 | yes | characteristic |
| 432 | C2×C22⋊C4 | D4×C31 | 1 | 1 | yes | characteristic |
| 433 | C2×C42 | — | 2 | 1 | no | — |
| 434 | C2×C42 | C23×C31 | 1 | 1 | yes | characteristic |
| 435 | C2×C42 | C23×C31 | 1 | 1 | yes | characteristic |
| 436 | #107 | — | 2 | 2 | no | — |
| 437 | #107 | — | 4 | 1 | no | — |
| 438 | C4⋊C8 | — | 4 | 1 | no | — |
| 439 | C4⋊C8 | — | 4 | 1 | no | — |
| 440 | #102 | — | 2 | 2 | no | — |
| 441 | #102 | — | 4 | 1 | no | — |
| 442 | #102 | — | 4 | 1 | no | — |
| 443 | #102 | — | 4 | 1 | no | — |
| 444 | C22⋊C8 | — | 2 | 2 | no | — |
| 445 | #95 | — | 2 | 1 | no | — |
| 446 | #95 | — | 2 | 1 | no | — |
| 447 | #95 | — | 2 | 1 | no | — |
| 448 | #95 | — | 2 | 1 | no | — |
| 449 | #95 | — | 2 | 1 | no | — |
| 450 | #95 | — | 2 | 1 | no | — |
| 451 | #95 | — | 2 | 1 | no | — |
| 452 | #95 | D4×C31 | 1 | 1 | yes | characteristic |
| 453 | #95 | D4×C31 | 1 | 1 | yes | characteristic |
| 454 | C31 | #26420 | 1 | 1 | yes | characteristic, direct product factor, Sylow |
| 455 | C24 | — | 2 | 1 | no | — |
| 456 | C24 | C2×D4×C31 | 1 | 1 | yes | characteristic |
| 457 | C2×D4 | — | 2 | 4 | no | — |
| 458 | C2×D4 | — | 2 | 1 | no | — |
| 459 | C2×D4 | — | 2 | 1 | no | — |
| 460 | C2×D4 | — | 2 | 1 | no | — |
| 461 | C2×D4 | — | 2 | 1 | no | — |
| 462 | C2×D4 | — | 2 | 1 | no | — |
| 463 | C2×D4 | — | 4 | 2 | no | — |
| 464 | C2×D4 | — | 4 | 2 | no | — |
| 465 | C2×D4 | C2×Q8×C31 | 1 | 2 | yes | — |
| 466 | C22×C4 | — | 2 | 1 | no | — |
| 467 | C22×C4 | — | 2 | 1 | no | — |
| 468 | C22×C4 | — | 2 | 1 | no | — |
| 469 | C22×C4 | — | 2 | 1 | no | — |
| 470 | C22×C4 | — | 2 | 1 | no | — |
| 471 | C22×C4 | — | 2 | 1 | no | — |
| 472 | C22×C4 | — | 2 | 1 | no | — |
| 473 | C22×C4 | — | 2 | 1 | no | — |
| 474 | C22×C4 | — | 2 | 1 | no | — |
| 475 | C22×C4 | — | 2 | 1 | no | — |
| 476 | C22×C4 | — | 2 | 1 | no | — |
| 477 | C22×C4 | — | 4 | 2 | no | — |
| 478 | C22×C4 | — | 4 | 2 | no | — |
| 479 | C22×C4 | — | 4 | 2 | no | — |
| 480 | C22×C4 | — | 4 | 2 | no | — |
| 481 | C22×C4 | — | 4 | 2 | no | — |
| 482 | C22×C4 | — | 4 | 2 | no | — |
| 483 | C22×C4 | — | 8 | 1 | no | — |
| 484 | C22×C4 | — | 8 | 1 | no | — |
| 485 | C22×C4 | — | 8 | 1 | no | — |
| 486 | C22×C4 | C2×D4×C31 | 1 | 1 | yes | characteristic |
| 487 | C22×C4 | C2×D4×C31 | 1 | 1 | yes | characteristic |
| 488 | C22×C4 | C2×D4×C31 | 1 | 1 | yes | characteristic |
| 489 | C22×C4 | C2×D4×C31 | 1 | 1 | yes | characteristic |
| 490 | C22×C4 | C2×D4×C31 | 1 | 1 | yes | characteristic |
| 491 | C22×C4 | C2×Q8×C31 | 1 | 2 | yes | — |
| 492 | C22×C4 | #41×C31 | 1 | 2 | yes | — |
| 493 | C22×C4 | C24×C31 | 1 | 1 | yes | characteristic |
| 494 | C2×C8 | — | 2 | 1 | no | — |
| 495 | C2×C8 | — | 2 | 1 | no | — |
| 496 | C2×C8 | — | 2 | 1 | no | — |
| 497 | C2×C8 | — | 2 | 1 | no | — |
| 498 | C2×C8 | — | 2 | 1 | no | — |
| 499 | C2×C8 | — | 2 | 1 | no | — |
| 500 | C2×C8 | — | 2 | 1 | no | — |
| 501 | C2×C8 | — | 2 | 1 | no | — |
| 502 | C2×C8 | — | 2 | 1 | no | — |
| 503 | C2×C8 | — | 2 | 1 | no | — |
| 504 | C2×C8 | — | 2 | 1 | no | — |
| 505 | C2×C8 | — | 2 | 1 | no | — |
| 506 | C2×C8 | — | 4 | 4 | no | — |
| 507 | C4⋊C4 | — | 2 | 1 | no | — |
| 508 | C4⋊C4 | — | 2 | 1 | no | — |
| 509 | C4⋊C4 | — | 2 | 1 | no | — |
| 510 | C4⋊C4 | — | 2 | 1 | no | — |
| 511 | C4⋊C4 | — | 2 | 1 | no | — |
| 512 | C4⋊C4 | — | 2 | 1 | no | — |
| 513 | C4⋊C4 | — | 2 | 1 | no | — |
| 514 | C4⋊C4 | — | 2 | 1 | no | — |
| 515 | C4⋊C4 | — | 2 | 1 | no | — |
| 516 | C4⋊C4 | — | 2 | 1 | no | — |
| 517 | C4⋊C4 | — | 2 | 1 | no | — |
| 518 | C4⋊C4 | — | 4 | 2 | no | — |
| 519 | C4⋊C4 | — | 4 | 2 | no | — |
| 520 | C4⋊C4 | — | 4 | 2 | no | — |
| 521 | C4⋊C4 | — | 4 | 2 | no | — |
| 522 | C4⋊C4 | — | 4 | 2 | no | — |
| 523 | C4⋊C4 | — | 8 | 1 | no | — |
| 524 | C4⋊C4 | — | 8 | 1 | no | — |
| 525 | C4⋊C4 | C2×Q8×C31 | 1 | 2 | yes | — |
| 526 | C4⋊C4 | #41×C31 | 1 | 2 | yes | — |
| 527 | C4⋊C4 | #41×C31 | 1 | 2 | yes | — |
| 528 | C22⋊C4 | — | 2 | 2 | no | — |
| 529 | C22⋊C4 | — | 2 | 2 | no | — |
| 530 | C22⋊C4 | — | 2 | 4 | no | — |
| 531 | C22⋊C4 | — | 4 | 2 | no | — |
| 532 | C22⋊C4 | — | 4 | 2 | no | — |
| 533 | C22⋊C4 | — | 4 | 2 | no | — |
| 534 | C22⋊C4 | — | 8 | 1 | no | — |
| 535 | C42 | — | 2 | 1 | no | — |
| 536 | C42 | — | 2 | 1 | no | — |
| 537 | C42 | — | 2 | 1 | no | — |
| 538 | C42 | — | 2 | 1 | no | — |
| 539 | C42 | — | 4 | 2 | no | — |
| 540 | C23 | — | 2 | 1 | no | — |
| 541 | C23 | — | 2 | 1 | no | — |
| 542 | C23 | — | 2 | 1 | no | — |
| 543 | C23 | — | 2 | 1 | no | — |
| 544 | C23 | — | 2 | 2 | no | — |
| 545 | C23 | — | 4 | 1 | no | — |
| 546 | C23 | — | 4 | 1 | no | — |
| 547 | C23 | — | 4 | 1 | no | — |
| 548 | C23 | — | 4 | 1 | no | — |
| 549 | C23 | — | 4 | 1 | no | — |
| 550 | C23 | — | 4 | 1 | no | — |
| 551 | C23 | C31×C22⋊Q8 | 1 | 2 | yes | — |
| 552 | C23 | C31×#135 | 1 | 2 | yes | — |
| 553 | C23 | C31×AGL(1,ℤ/8) | 1 | 2 | yes | — |
| 554 | C23 | C22×D4×C31 | 1 | 1 | yes | characteristic |
| 555 | D4 | — | 2 | 2 | no | — |
| 556 | D4 | — | 2 | 2 | no | — |
| 557 | D4 | — | 4 | 8 | no | — |
| 558 | D4 | — | 4 | 1 | no | — |
| 559 | D4 | — | 4 | 1 | no | — |
| 560 | C2×C4 | — | 2 | 1 | no | — |
| 561 | C2×C4 | — | 2 | 1 | no | — |
| 562 | C2×C4 | — | 2 | 2 | no | — |
| 563 | C2×C4 | — | 2 | 2 | no | — |
| 564 | C2×C4 | — | 2 | 2 | no | — |
| 565 | C2×C4 | — | 2 | 2 | no | — |
| 566 | C2×C4 | — | 2 | 2 | no | — |
| 567 | C2×C4 | — | 2 | 1 | no | — |
| 568 | C2×C4 | — | 2 | 1 | no | — |
| 569 | C2×C4 | — | 2 | 1 | no | — |
| 570 | C2×C4 | — | 2 | 1 | no | — |
| 571 | C2×C4 | — | 2 | 2 | no | — |
| 572 | C2×C4 | — | 2 | 2 | no | — |
| 573 | C2×C4 | — | 2 | 1 | no | — |
| 574 | C2×C4 | — | 2 | 1 | no | — |
| 575 | C2×C4 | — | 2 | 1 | no | — |
| 576 | C2×C4 | — | 2 | 1 | no | — |
| 577 | C2×C4 | — | 2 | 1 | no | — |
| 578 | C2×C4 | — | 2 | 1 | no | — |
| 579 | C2×C4 | — | 2 | 1 | no | — |
| 580 | C2×C4 | — | 2 | 1 | no | — |
| 581 | C2×C4 | — | 4 | 1 | no | — |
| 582 | C2×C4 | — | 4 | 1 | no | — |
| 583 | C2×C4 | — | 4 | 1 | no | — |
| 584 | C2×C4 | — | 4 | 1 | no | — |
| 585 | C2×C4 | — | 4 | 1 | no | — |
| 586 | C2×C4 | — | 4 | 1 | no | — |
| 587 | C2×C4 | — | 4 | 1 | no | — |
| 588 | C2×C4 | — | 4 | 1 | no | — |
| 589 | C2×C4 | — | 4 | 1 | no | — |
| 590 | C2×C4 | — | 4 | 1 | no | — |
| 591 | C2×C4 | — | 4 | 1 | no | — |
| 592 | C2×C4 | — | 4 | 1 | no | — |
| 593 | C2×C4 | — | 4 | 1 | no | — |
| 594 | C2×C4 | — | 4 | 1 | no | — |
| 595 | C2×C4 | — | 4 | 1 | no | — |
| 596 | C2×C4 | — | 4 | 1 | no | — |
| 597 | C2×C4 | — | 4 | 1 | no | — |
| 598 | C2×C4 | — | 4 | 1 | no | — |
| 599 | C2×C4 | — | 8 | 4 | no | — |
| 600 | C2×C4 | — | 8 | 4 | no | — |
| 601 | C2×C4 | — | 8 | 4 | no | — |
| 602 | C2×C4 | C31×C22⋊Q8 | 1 | 2 | yes | — |
| 603 | C2×C4 | C22×Q8×C31 | 1 | 1 | yes | characteristic |
| 604 | C2×C4 | C2×#41×C31 | 1 | 1 | yes | characteristic |
| 605 | C2×C4 | C2×#41×C31 | 1 | 1 | yes | characteristic |
| 606 | C2×C4 | C2×#41×C31 | 1 | 1 | yes | characteristic |
| 607 | C2×C4 | C31×H(5,𝔽2) | 1 | 1 | yes | characteristic |
| 608 | C2×C4 | C31×H(5,𝔽2) | 1 | 1 | yes | characteristic |
| 609 | C8 | — | 4 | 1 | no | — |
| 610 | C8 | — | 4 | 1 | no | — |
| 611 | C8 | — | 4 | 1 | no | — |
| 612 | C8 | — | 4 | 1 | no | — |
| 613 | C22 | — | 2 | 2 | no | — |
| 614 | C22 | — | 2 | 2 | no | — |
| 615 | C22 | — | 2 | 2 | no | — |
| 616 | C22 | — | 2 | 2 | no | — |
| 617 | C22 | — | 2 | 2 | no | — |
| 618 | C22 | — | 2 | 2 | no | — |
| 619 | C22 | — | 4 | 2 | no | — |
| 620 | C22 | — | 4 | 2 | no | — |
| 621 | C22 | — | 4 | 2 | no | — |
| 622 | C22 | — | 8 | 1 | no | — |
| 623 | C22 | — | 8 | 1 | no | — |
| 624 | C22 | — | 8 | 1 | no | — |
| 625 | C22 | — | 8 | 1 | no | — |
| 626 | C22 | C31×#478 | 1 | 4 | yes | — |
| 627 | C22 | C2×C31×C22⋊Q8 | 1 | 1 | yes | characteristic |
| 628 | C22 | C31×#546 | 1 | 1 | yes | characteristic |
| 629 | C22 | C31×#546 | 1 | 1 | yes | characteristic |
| 630 | C22 | C2×C31×#135 | 1 | 1 | yes | characteristic |
| 631 | C22 | C2×C31×AGL(1,ℤ/8) | 1 | 1 | yes | characteristic |
| 632 | C22 | C31×#576 | 1 | 1 | yes | characteristic |
| 633 | C22 | C31×#578 | 1 | 1 | yes | characteristic |
| 634 | C4 | — | 2 | 2 | no | — |
| 635 | C4 | — | 4 | 1 | no | — |
| 636 | C4 | — | 4 | 2 | no | — |
| 637 | C4 | — | 4 | 1 | no | — |
| 638 | C4 | — | 4 | 1 | no | — |
| 639 | C4 | — | 4 | 1 | no | — |
| 640 | C4 | — | 4 | 2 | no | — |
| 641 | C4 | — | 4 | 2 | no | — |
| 642 | C4 | — | 8 | 1 | no | — |
| 643 | C4 | — | 8 | 1 | no | — |
| 644 | C4 | — | 8 | 1 | no | — |
| 645 | C4 | — | 8 | 1 | no | — |
| 646 | C4 | C31×#529 | 1 | 1 | yes | characteristic |
| 647 | C4 | C31×#538 | 1 | 1 | yes | characteristic |
| 648 | C4 | C31×#554 | 1 | 1 | yes | characteristic |
| 649 | C4 | C31×#554 | 1 | 1 | yes | characteristic |
| 650 | C2 | — | 2 | 4 | no | — |
| 651 | C2 | — | 8 | 2 | no | — |
| 652 | C2 | C31×#2450 | 1 | 1 | yes | characteristic |
| 653 | C2 | C2×C31×#478 | 1 | 1 | yes | characteristic |
| 654 | C2 | C31×#3083 | 1 | 1 | yes | characteristic |
| 655 | C2 | C31×#3297 | 1 | 1 | yes | characteristic |
| 656 | C2 | C31×#3300 | 1 | 1 | yes | characteristic |
| 657 | C2 | C31×#3308 | 1 | 1 | yes | characteristic |
| 658 | C2 | C31×#3318 | 1 | 1 | yes | characteristic |
Finite Group Databasebeta