Finite Group DatabasebetaFinite Group Databasebeta| order | 256 |
| nilpotency class | 5 |
| isoclinism | isoclinic class of #1402 |
| automorphism | Aut(G) = #72249492 (order 2048) · Inn(G) = AΣL(1,𝔽16) · Out(G) = C22×D4 |
| homology | Abelianization (H1) = C42 · Schur multiplier (H2) = C22 |
No aliases for this group.
| subgroup | G/H | |
|---|---|---|
| center, socle | C22 | AΣL(1,𝔽16) |
| commutator | C2×D4 | C42 |
| Frattini, cosocle | C2×#124 | C22 |
| prime radical | C22×D4 | C2×C4 |
| LCS | G ▷ C2×D4 ▷ C2×C4 ▷ C22 ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C22 ◁ C23 ◁ C22×C4 ◁ C2×#124 ◁ G | |
| LECS | G ▷ C2×#124 ▷ C2×C4 ▷ C22 ▷ C2 ▷ C1 | |
149 conjugacy classes of subgroups; only the 35 normal subgroups are shown.
This group has 149 conjugacy classes of subgroups — too many to draw. Only its 35 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) = 32 |
A minimal faithful permutation representation — 2 generators on 20 points:
(5,6,9,13,10,7,8,16)(11,17,18,12,20,14,19,15);(1,2,3,4)(5,7,10,6)(8,15,9,12)(11,14,20,17)(13,18,16,19)Polycyclic presentation:
2^8|a^2=d,b^2=e,d^2=h,f^2=h,b^a=bc,c^a=cf,f^a=fg,g^a=gh,d^b=dfh,f^b=fh,g^b=gh,d^c=dgh,f^c=fh,f^d=fh34 conjugacy classes — view the full character table.
| maximal subgroup of | C2×#7487, #151796, #151797, … |
| maximal normal subgroup of | C2×#7487, #151796, #151797, … |
| maximal quotient of | #94086, #94131, #94142, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(256, 475);