C₂×#500 #3159

order	128
nilpotency class	3
isoclinism	isoclinic class of #465
automorphism	Aut(G) order 65536
homology	Abelianization (H₁) = C₂⁴ · Schur multiplier (H₂) = C₂⁵

Aliases

	subgroup	G/H
center, socle, prime radical	C₂³	C₂×D₄
commutator, Frattini, cosocle	C₂×C₄	C₂⁴
LCS	G ▷ C₂×C₄ ▷ C₂ ▷ C₁
UCS	C₁ ◁ C₂³ ◁ C₂×C₄² ◁ G
LECS	G ▷ C₂×C₄ ▷ C₂ ▷ C₁

212 conjugacy classes of subgroups.

minimal degree	μ(G) = 18
transitive degree	μ_t(G) = 128

A minimal faithful permutation representation — 4 generators on 18 points:

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

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(128, 1891);