D₂₁×C₇₉ #15693294

order	3318
isoclinism	isoclinic class of D₂₁
automorphism	?
homology	Abelianization (H₁) = C₂×C₇₉ · Schur multiplier (H₂) = C₁

Aliases

direct product	D₂₁×C₇₉
unambiguous semidirect product	C₃⋊(D₇×C₇₉)
unambiguous semidirect product	C₇⋊(D₃×C₇₉)

Splittings

Fitting, socle, Hall	C₃×C₇×C₇₉ ⋊ C₂
derived, Hall	C₃×C₇ ⋊ C₂×C₇₉
Hall	C₇×C₇₉ ⋊ D₃
Hall	C₃×C₇₉ ⋊ D₇
Sylow	C₇ ⋊ D₃×C₇₉
Sylow	C₃ ⋊ D₇×C₇₉

Subgroups

	subgroup	G/H
center, hypercenter	C₇₉	D₂₁
commutator, cosocle, hypocenter	C₃×C₇	C₂×C₇₉
Frattini	C₁	G
Fitting, socle	C₃×C₇×C₇₉	C₂
LCS	G ▷ C₃×C₇
UCS	C₁ ◁ C₇₉

16 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degree	μ(G) = 89
transitive degree	μ_t(G) = 1659

A minimal faithful permutation representation — 2 generators on 89 points:

(1,2,3)(4,5,6,7,8,9,10)(11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89);(2,3)(5,10)(6,9)(7,8)

Conjugacy classes & character table

948 conjugacy classes. The character table is too large to display.

Relationships

maximal subgroup of	C₅×D₂₁×C₇₉, C₇₉×D₁₀₅, C₇₉×D₁₄₇, …
maximal normal subgroup of	C₅×D₂₁×C₇₉, C₇×D₂₁×C₇₉, C₁₁×D₂₁×C₇₉
maximal quotient of	C₅×D₂₁×C₇₉, C₇₉×D₁₀₅, C₇₉×D₁₄₇, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(3318, 11);

D21×C79 #15693294