C₅×#18621 #11941341

order	1280
nilpotency class	3
isoclinism	isoclinic class of #18618
automorphism	?
homology	Abelianization (H₁) = C₂⁴×C₅ · Schur multiplier (H₂) = C₂⁵

Aliases

	subgroup	G/H
center, socle	C₂²×C₅	C₂×#120
commutator, Frattini, cosocle	C₄²	C₂⁴×C₅
prime radical	C₅×#3498	C₂
LCS	G ▷ C₄² ▷ C₂² ▷ C₁
UCS	C₁ ◁ C₂²×C₅ ◁ C₂×C₄²×C₅ ◁ G

1314 conjugacy classes of subgroups.

minimal degree	μ(G) = 21
transitive degree	μ_t(G) = 320

A minimal faithful permutation representation — 4 generators on 21 points:

(1,2,3,4,5)(6,7,10,13)(8,12,9,11)(15,18)(16,20)(19,21);(7,11)(8,9)(12,13)(16,20)(18,21);(14,15)(16,21)(17,19)(18,20);(6,8,10,9)(7,11,13,12)

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(1280, 11609);