Finite Group DatabasebetaFinite Group Databasebeta| order | 256 |
| nilpotency class | 4 |
| isoclinism | isoclinic class of #13343 |
| automorphism | Aut(G) = C25×B(4,𝔽2) (order 2048) · Inn(G) = B(4,𝔽2) · Out(G) = C25 |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C23 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | B(4,𝔽2) |
| commutator, Frattini, prime radical, cosocle | C22×D4 | C23 |
| LCS | G ▷ C22×D4 ▷ C22 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C23 ◁ C22×D4 ◁ G | |
| LECS | G ▷ C22×D4 ▷ C22 ▷ C2 ▷ C1 | |
254 conjugacy classes of subgroups; only the 45 normal subgroups are shown.
This group has 254 conjugacy classes of subgroups — too many to draw. Only its 45 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:
(2,3)(5,6,10,7)(8,15,17,20)(9,14,19,12)(11,18,13,16);(1,2)(3,4)(5,7,10,6)(8,13,17,11)(9,12,19,14)(15,16,20,18);(1,3,4,2)(5,8)(6,11)(7,13)(9,18)(10,17)(12,20)(14,15)(16,19)Polycyclic presentation:
2^8|a^2=h,b^2=h,c^2=d,e^2=h,b^a=bd,c^a=ce,e^a=eh,f^a=fgh,c^b=cf,e^b=eg,e^c=eh,g^c=gh,f^e=fh31 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#13425, #499132, #499134, … |
| maximal normal subgroup of | C2×#13425, #499132, #499134, … |
| maximal quotient of | #144665, #144669, #144701, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(256, 6413);