Finite Group Databasebeta
Cayley diagram

C4×#555 #34165

order256
nilpotency class2
isoclinismisoclinic class of D42
automorphismAut(G) order 262144
homologyAbelianization (H1) = C24×C4 · Schur multiplier (H2) = C27×C4

Aliases

direct productC4×#555

Subgroups

subgroupG/H
centerC22×C4C24
commutatorC22C24×C4
Frattini, socle, cosocleC23C25
prime radicalC2×#555C2
LCSG ▷ C22 ▷ C1
UCSC1 ◁ C22×C4 ◁ G
LECSG ▷ C23 ▷ C1

1282 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 20
transitive degreeμt(G) = 128

A minimal faithful permutation representation — 5 generators on 20 points:

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

Conjugacy classes & character table

100 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#97667, #129583, C4×#1624, …
maximal normal subgroup of#97667, #129583, C4×#1624, …
maximal quotient ofC4×#2354, C4×#2346, C4×#2363, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(256, 27153);