Finite Group Databasebeta
Cayley diagram

#20565

order256
nilpotency class2
isoclinismisoclinic class of #534
automorphismAut(G) order 32768
homologyAbelianization (H1) = C22×C42 · Schur multiplier (H2) = C23×C4

Aliases

No aliases for this group.

Subgroups

subgroupG/H
center, Frattini, cosocleC22×C4C24
commutatorC22C22×C42
socleC23C23×C4
prime radicalC22×D4C2×C4
LCSG ▷ C22 ▷ C1
UCSC1 ◁ C22×C4 ◁ G
LECSG ▷ C22×C4 ▷ C2 ▷ C1

491 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 28
transitive degreeμt(G) = 128

A minimal faithful permutation representation — 4 generators on 28 points:

(5,6)(7,11)(8,10)(9,12)(13,14,18,21,17,16,20,25)(15,22,24,28,23,19,26,27);(1,2,3,4)(5,7)(6,9)(8,12)(10,11)(13,15)(14,19)(16,22)(17,23)(18,24)(20,26)(21,27)(25,28);(7,12)(9,11)(13,16,18,25,17,14,20,21)(15,22,24,28,23,19,26,27);(6,10)(9,11)(15,23)(19,22)(24,26)(27,28)

Polycyclic presentation:

2^8|a^2=f,b^2=g,c^2=f,f^2=h,b^a=be,d^a=deh,c^b=ceh,d^b=dh

Conjugacy classes & character table

88 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#183895, #183896, #183898, …
maximal normal subgroup of#183895, #183896, #183898, …
maximal quotient of#184581, #184584, #184591, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(256, 13553);