Finite Group Databasebeta
Cayley diagram

C2×#555 #3473

order128
nilpotency class2
isoclinismisoclinic class of D42
automorphismAut(G) order 131072
homologyAbelianization (H1) = C25 · Schur multiplier (H2) = C27×C4

Aliases

direct productC2×#555

Subgroups

subgroupG/H
center, socleC23C24
commutator, Frattini, cosocleC22C25
LCSG ▷ C22 ▷ C1
UCSC1 ◁ C23 ◁ G
LECSG ▷ C22 ▷ C1

620 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 18
transitive degreeμt(G) = 64

A minimal faithful permutation representation — 5 generators on 18 points:

(1,2);(3,4)(5,9)(6,10)(7,8)(12,13)(16,17);(4,8)(6,9)(11,12,15,13)(14,17,18,16);(3,5,7,10)(4,9,8,6)(11,13,15,12)(14,17,18,16);(3,6,7,9)(4,10,8,5)(11,14,15,18)(12,16,13,17)

Conjugacy classes & character table

50 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#8360, #8397, #8452, …
maximal normal subgroup of#8360, #8397, #8452, …
maximal quotient ofC2×#2346, C2×#2354, C2×#2363, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(128, 2205);