#26990

order	256
nilpotency class	3
isoclinism	isoclinic class of #24289
automorphism	Aut(G) order 4096
homology	Abelianization (H₁) = C₂⁴ · Schur multiplier (H₂) = C₂⁴

Aliases

No aliases for this group.

Subgroups

	subgroup	G/H
center, socle	C₂²	D₄²
commutator, Frattini, cosocle	C₂²×C₄	C₂⁴
prime radical	#537	C₂²
LCS	G ▷ C₂²×C₄ ▷ C₂ ▷ C₁
UCS	C₁ ◁ C₂² ◁ C₂²×C₄ ◁ G
LECS	G ▷ C₂²×C₄ ▷ C₂ ▷ C₁

383 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degree	μ(G) = 40
transitive degree	μ_t(G) = 64

A minimal faithful permutation representation — 4 generators on 40 points:

(1,2)(3,7)(4,6)(5,8)(9,10)(11,17)(12,25)(13,28)(14,21)(15,20)(16,23)(18,29)(19,26)(22,36)(24,32)(27,31)(30,35)(33,37)(34,40)(38,39);(1,3,4,8)(2,5,6,7)(9,11,14,23,15,12,26,24)(10,16,19,17,20,32,21,25)(13,22,29,37,30,27,40,38)(18,31,28,33,34,36,35,39);(2,6)(5,7)(9,12)(10,17)(11,15)(13,27)(14,24)(16,21)(18,33)(19,32)(20,25)(22,30)(23,26)(28,36)(29,38)(31,35)(34,39)(37,40);(2,6)(5,7)(9,13,26,40,15,30,14,29)(10,18,21,35,20,34,19,28)(11,22,24,38,12,27,23,37)(16,31,25,39,32,36,17,33)

Polycyclic presentation:

2^8|b^2=e,d^2=ef,e^2=h,g^2=h,b^a=be,c^a=cf,d^a=de,e^a=eh,c^b=cg,g^b=gh,g^c=gh

Conjugacy classes & character table

46 conjugacy classes — view the full character table.

Relationships

maximal subgroup of	C₂×#26990, #6443723, #6443729, …
maximal normal subgroup of	C₂×#26990, #6443723, #6443729, …
maximal quotient of	#312553, #312556, #312558, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(256, 19978);