Finite Group Databasebeta
Cayley diagram

C2×M128 #13736

order256
nilpotency class2
isoclinismisoclinic class of D4
automorphismAut(G) = C2×#495677 (order 1024) · Inn(G) = C22 · Out(G) = C22×C8×D4
homologyAbelianization (H1) = C22×C32 · Schur multiplier (H2) = C22

Aliases

direct productC2×M128

Subgroups

subgroupG/H
centerC2×C32C22
commutatorC2C22×C32
Frattini, cosocleC32C23
socleC22C2×C32
prime radicalC23C32
LCSG ▷ C2 ▷ C1
UCSC1 ◁ 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);(4,36)(6,38)(8,40)(10,42)(12,44)(14,46)(16,48)(18,50)(20,52)(22,54)(24,56)(26,58)(28,60)(30,62)(32,64)(34,66)

Conjugacy classes & character table

160 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#94756, #94757, #94758, …
maximal normal subgroup of#94756, #94757, #94758, …
maximal quotient ofC2×#7510, C4×M128, C2×C22⋊C64, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(256, 6724);