Finite Group DatabasebetaFinite Group Databasebeta| order | 256 |
| nilpotency class | 4 |
| isoclinism | isoclinic class of #2190 |
| automorphism | Aut(G) = C24×#3109 (order 2048) · Inn(G) = #447 · Out(G) = C25 |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C23 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | #447 |
| commutator | C2×C8 | C22×C4 |
| Frattini, cosocle | C22×C8 | C23 |
| prime radical | C2×#135 | C22 |
| LCS | G ▷ C2×C8 ▷ C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C22×C4 ◁ C2×#97 ◁ G | |
| LECS | G ▷ C22×C8 ▷ C4 ▷ C2 ▷ C1 | |
211 conjugacy classes of subgroups; only the 69 normal subgroups are shown.
This group has 211 conjugacy classes of subgroups — too many to draw. Only its 69 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)(8,18)(9,17)(12,16)(13,20)(15,19);(1,3,4,2)(5,6)(7,15)(8,16)(9,19)(10,13)(11,14)(12,17)(18,20);(5,6)(7,16)(8,15)(9,19)(10,13)(11,18)(12,17)(14,20)Polycyclic presentation:
2^8|a^2=f,b^2=f,d^2=gh,e^2=gh,g^2=h,b^a=bd,c^a=ce,d^a=dg,e^a=eg,g^a=gh,d^b=dg,e^b=egh,g^b=gh,d^c=dgh,e^c=eg,g^c=gh40 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#12943, #494306, #494307, … |
| maximal normal subgroup of | C2×#12943, #494306, #494307, … |
| maximal quotient of | #135887, #135925, #136142, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(256, 5931);