Finite Group Databasebeta
Cayley diagram

C2×SD128 #13739

order256
nilpotency class6
isoclinismisoclinic class of D64
automorphismAut(G) order 8192
homologyAbelianization (H1) = C23 · Schur multiplier (H2) = C22

Aliases

direct productC2×SD128

Subgroups

subgroupG/H
center, socleC22D32
commutator, Frattini, cosocleC32C23
prime radicalC2×D32C2
LCSG ▷ C32 ▷ C16 ▷ C8 ▷ C4 ▷ C2 ▷ C1
UCSC1 ◁ C22 ◁ C2×C4 ◁ C2×C8 ◁ C2×C16 ◁ C2×C32 ◁ G
LECSG ▷ C32 ▷ C16 ▷ C8 ▷ C4 ▷ C2 ▷ C1

67 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 66
transitive degreeμt(G) = 128

A minimal faithful permutation representation — 3 generators on 66 points:

(1,2);(3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66);(4,34)(5,65)(6,32)(7,63)(8,30)(9,61)(10,28)(11,59)(12,26)(13,57)(14,24)(15,55)(16,22)(17,53)(18,20)(19,51)(21,49)(23,47)(25,45)(27,43)(29,41)(31,39)(33,37)(36,66)(38,64)(40,62)(42,60)(44,58)(46,56)(48,54)(50,52)

Conjugacy classes & character table

70 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofC4×SD128, #153592, #153602, …
maximal normal subgroup ofC4×SD128, #153592, #153602, …
maximal quotient ofC2×#7537, C2×#7538, C2×#7546, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(256, 6727);