Finite Group DatabasebetaFinite Group Databasebeta| order | 256 |
| nilpotency class | 4 |
| isoclinism | isoclinic class of #12324 |
| automorphism | Aut(G) = C23×#21452 (order 2048) · Inn(G) = #447 · Out(G) = C23×C4 |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C22 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle, prime radical | C22 | #447 |
| commutator, Frattini, cosocle | C4×C8 | C23 |
| LCS | G ▷ C4×C8 ▷ C2×C4 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C42 ◁ #446 ◁ G | |
| LECS | G ▷ C4×C8 ▷ C2×C4 ▷ C2 ▷ C1 | |
139 conjugacy classes of subgroups; only the 41 normal subgroups are shown.
This group has 139 conjugacy classes of subgroups — too many to draw. Only its 41 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| minimal degree | μ(G) = 40 |
| transitive degree | μt(G) = 256 |
A minimal faithful permutation representation — 3 generators on 40 points:
(2,6)(3,7)(4,8)(9,10,14,18)(11,19,21,38)(12,23,25,37)(13,28,26,17)(15,30,31,20)(16,33,35,27)(22,39,29,34)(24,36,40,32);(1,2,5,3)(4,7,8,6)(9,11,14,21)(10,15,18,31)(12,24,25,40)(13,29,26,22)(16,34,35,39)(17,36,28,32)(19,37,38,23)(20,33,30,27);(1,3,5,2)(4,6,8,7)(12,25)(16,35)(19,38)(20,30)(23,37)(24,40)(27,33)(34,39)Polycyclic presentation:
2^8|a^2=h,b^2=g,c^2=gh,d^2=fh,e^2=gh,f^2=h,b^a=bd,c^a=ce,d^a=df,e^a=egh,f^a=fh,d^b=df,e^b=eg,f^b=fh,d^c=dg,e^c=egh31 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#12363, #489057, #489059, … |
| maximal normal subgroup of | C2×#12363, #489057, #489059, … |
| maximal quotient of | #125663, #125665, #125752, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(256, 5351);