D₁₉₄₆₀ #72274014

order	38920
automorphism	?
homology	Abelianization (H₁) = C₂² · Schur multiplier (H₂) = C₂

Aliases

dihedral

D₁₉₄₆₀

Splittings

Fitting	C₄×C₅×C₇×C₁₃₉ ⋊ C₂
Hall	C₅×C₇×C₁₃₉ ⋊ D₄
Hall	C₇×C₁₃₉ ⋊ D₂₀
Hall	C₅×C₁₃₉ ⋊ D₂₈
Sylow	C₁₃₉ ⋊ D₁₄₀
Hall	C₅×C₇ ⋊ D₅₅₆
Sylow	C₇ ⋊ D₂₇₈₀
Sylow	C₅ ⋊ D₃₈₉₂

Subgroups

	subgroup	G/H
center, Frattini	C₂	C₂×D₄₈₆₅
commutator, socle, cosocle	C₂×C₅×C₇×C₁₃₉	C₂²
Fitting	C₄×C₅×C₇×C₁₃₉	C₂
hypercenter	C₄	D₄₈₆₅
hypocenter	C₅×C₇×C₁₃₉	D₄
LCS	G ▷ C₂×C₅×C₇×C₁₃₉ ▷ C₅×C₇×C₁₃₉
UCS	C₁ ◁ C₂ ◁ C₄

64 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degree	μ(G) = 155
transitive degree	μ_t(G) = 19460

A minimal faithful permutation representation — 2 generators on 155 points:

(1,2,3,4)(5,6,7,8,9)(10,11,12,13,14,15,16)(17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155);(2,4)(6,9)(7,8)(11,16)(12,15)(13,14)(18,155)(19,154)(20,153)(21,152)(22,151)(23,150)(24,149)(25,148)(26,147)(27,146)(28,145)(29,144)(30,143)(31,142)(32,141)(33,140)(34,139)(35,138)(36,137)(37,136)(38,135)(39,134)(40,133)(41,132)(42,131)(43,130)(44,129)(45,128)(46,127)(47,126)(48,125)(49,124)(50,123)(51,122)(52,121)(53,120)(54,119)(55,118)(56,117)(57,116)(58,115)(59,114)(60,113)(61,112)(62,111)(63,110)(64,109)(65,108)(66,107)(67,106)(68,105)(69,104)(70,103)(71,102)(72,101)(73,100)(74,99)(75,98)(76,97)(77,96)(78,95)(79,94)(80,93)(81,92)(82,91)(83,90)(84,89)(85,88)(86,87)

Polycyclic presentation:

2^3,5,7,139|b^2=c,b^a=bc,d^a=d^4,e^a=e^6,f^a=f^138

Conjugacy classes & character table

9733 conjugacy classes. The character table is too large to display.

GAP

Past the SmallGroups library coverage — no SmallGroups id. Construct it from its polycyclic presentation:

gap> F := FreeGroup(IsSyllableWordsFamily, "a", "b", "c", "d", "e", "f");;
gap> coll := SingleCollector(F, [2, 2, 2, 5, 7, 139]);;
gap> SetPower(coll, 2, F.3);;
gap> SetConjugate(coll, 2, 1, F.2*F.3);;
gap> SetConjugate(coll, 4, 1, F.4^4);;
gap> SetConjugate(coll, 5, 1, F.5^6);;
gap> SetConjugate(coll, 6, 1, F.6^138);;
gap> UpdatePolycyclicCollector(coll);;
gap> G := GroupByRws(coll);

D19460 #72274014