Finite Group DatabasebetaFinite Group Databasebeta| order | 256 |
| nilpotency class | 4 |
| isoclinism | isoclinic class of #2230 |
| automorphism | Aut(G) = C24×#3109 (order 2048) · Inn(G) = #476 · Out(G) = C25 |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C4 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | #476 |
| commutator | C2×C8 | C22×C4 |
| Frattini, cosocle | C22×C8 | C23 |
| prime radical | C23 | AGL(1,ℤ/8) |
| LCS | G ▷ C2×C8 ▷ C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C22×C4 ◁ C2×C4×C8 ◁ G | |
| LECS | G ▷ C22×C8 ▷ C4 ▷ C2 ▷ C1 | |
138 conjugacy classes of subgroups; only the 61 normal subgroups are shown.
This group has 138 conjugacy classes of subgroups — too many to draw. Only its 61 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| minimal degree | μ(G) = 20 |
| transitive degree | μt(G) = 64 |
A minimal faithful permutation representation — 3 generators on 20 points:
(1,2,4,3)(6,11)(7,14,16,20)(8,13)(9,18)(12,15,19,17);(1,3,4,2)(5,6,8,11,10,9,13,18)(7,12,15,20,16,19,17,14);(5,7,8,15,10,16,13,17)(6,12,11,20,9,19,18,14)Polycyclic presentation:
2^8|a^2=f,b^2=fg,c^2=d,d^2=h,e^2=g,g^2=h,b^a=bd,c^a=ce,d^a=dh,e^a=eg,g^a=gh,e^c=eg,f^c=fh,g^c=gh46 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#13116, #494799, #494800, … |
| maximal normal subgroup of | C2×#13116, #494799, #494800, … |
| maximal quotient of | #140079, #140096, #146888, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(256, 6104);