Finite Group Databasebeta
Cayley diagram

C2×#433 #2919

order128
nilpotency class2
isoclinismisoclinic class of #120
automorphismAut(G) order 8192
homologyAbelianization (H1) = C23×C4 · Schur multiplier (H2) = C23×C4

Aliases

direct productC2×#433

Subgroups

subgroupG/H
centerC22×C4C23
commutatorC22C23×C4
Frattini, cosocleC2×C4C24
socleC23C22×C4
prime radicalC24C2×C4
LCSG ▷ C22 ▷ C1
UCSC1 ◁ C22×C4 ◁ G
LECSG ▷ C2×C4 ▷ C2 ▷ C1

206 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 26
transitive degreeμt(G) = 64

A minimal faithful permutation representation — 4 generators on 26 points:

(1,2);(3,4)(5,8)(6,7)(9,10)(11,12,14,17,15,18,21,24)(13,16,20,23,19,22,25,26);(4,7)(8,10)(11,13)(12,16)(14,20)(15,19)(17,23)(18,22)(21,25)(24,26);(3,5,6,9)(4,8,7,10)(13,19)(16,22)(20,25)(23,26)

Conjugacy classes & character table

56 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#8158, #8603, #11461, …
maximal normal subgroup of#8158, #8603, #11461, …
maximal quotient ofC2×#1746, C2×#1750, C2×#1768, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(128, 1651);