Finite Group Databasebeta
Cayley diagram

C4×#135 #2939

order128
nilpotency class3
isoclinismisoclinic class of D8
automorphismAut(G) order 4096
homologyAbelianization (H1) = C23×C4 · Schur multiplier (H2) = C25

Aliases

direct productC4×#135

Subgroups

subgroupG/H
centerC42D4
commutatorC4C23×C4
Frattini, cosocleC2×C4C24
socleC22C22×D4
prime radicalC2×#135C2
LCSG ▷ C4 ▷ C2 ▷ C1
UCSC1 ◁ C42 ◁ C2×C42 ◁ G
LECSG ▷ C2×C4 ▷ C2 ▷ C1

250 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 20
transitive degreeμt(G) = 64

A minimal faithful permutation representation — 4 generators on 20 points:

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

Conjugacy classes & character table

56 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#11591, #11592, #11597, …
maximal normal subgroup of#11591, #11592, #11597, …
maximal quotient ofC8×#135, #17863, #17886, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(128, 1671);