Finite Group Databasebeta
Cayley diagram

C2×#400 #2394

order128
nilpotency class2
isoclinismisoclinic class of #392
automorphismAut(G) order 65536
homologyAbelianization (H1) = C24 · Schur multiplier (H2) = C25

Aliases

direct productC2×#400

Subgroups

subgroupG/H
center, socle, prime radicalC24C23
commutator, Frattini, cosocleC23C24
LCSG ▷ C23 ▷ C1
UCSC1 ◁ C24 ◁ G
LECSG ▷ C23 ▷ C1

302 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 22
transitive degreeμt(G) = 128

A minimal faithful permutation representation — 4 generators on 22 points:

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

Conjugacy classes & character table

44 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#9022, #9023, #9921, …
maximal normal subgroup of#9022, #9023, #9921, …
maximal quotient ofC2×#1441, C2×#1442, C2×#1443, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(128, 1126);