Order 31712.
62 conjugacy classes of subgroups.
| subgroup | G/H | |
|---|---|---|
| center | C4 | C22⋊D991 |
| commutator, cosocle | C4×C991 | C23 |
| Frattini | C4 | C22×D991 |
| Fitting | #41×C991 | C2 |
| socle | C2×C991 | C2×D4 |
| hypercenter | #41 | D991 |
| hypocenter | C991 | #135 |
| LCS | G ▷ C4×C991 ▷ C2×C991 ▷ C991 | |
| UCS | C1 ◁ C4 ◁ C2×C4 ◁ #41 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. #30629392 | C2 | semidirect |
| 2. #30629382 | C2 | semidirect |
| 3. #30629380 | C2 | semidirect |
| 4. #30629379 | C2 | semidirect |
| 5. #30629377 | C2 | semidirect |
| 6. C2×C991⋊C8 | C2 | semidirect |
| 7. #41×C991 | C2 | semidirect |
| 30. C991 | #135 | semidirect |
| 33. #41 | D991 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| #30629392 | 2 |
| #30629382 | 2 |
| #30629380 | 2 |
| #30629379 | 2 |
| #30629377 | 2 |
| C2×C991⋊C8 | 2 |
| #41×C991 | 2 |
| #135 | 991 |