Finite Group Databasebeta
Cayley diagram

C2×#365 #2154

order128
nilpotency class4
isoclinismisoclinic class of #365
automorphismAut(G) = #72231669 (order 1024) · Inn(G) = #106 · Out(G) = C25
homologyAbelianization (H1) = C22×C4 · Schur multiplier (H2) = C22

Aliases

direct productC2×#365

Subgroups

subgroupG/H
center, socleC22#106
commutatorC8C22×C4
Frattini, cosocleC2×C8C23
prime radicalC23SD16
LCSG ▷ C8 ▷ C4 ▷ C2 ▷ C1
UCSC1 ◁ C22 ◁ C22×C4 ◁ C22×C8 ◁ G
LECSG ▷ C2×C8 ▷ C4 ▷ C2 ▷ C1

76 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 18
transitive degreeμt(G) = 32

A minimal faithful permutation representation — 3 generators on 18 points:

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

Conjugacy classes & character table

32 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofC4×#365, #12677, #12831, …
maximal normal subgroup ofC4×#365, #12677, #12831, …
maximal quotient ofC2×#1368, #12000, #12019, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(128, 886);