Finite Group Databasebeta

#34178807

order20224
automorphism?
homologyAbelianization (H1) = C2×C42 · Schur multiplier (H2) = C2×C8

Aliases

No aliases for this group.

Splittings

SylowC79 ⋊ #8158

Subgroups

subgroupG/H
centerC2×C4C22⋊C4×D79
commutatorC23×C79C2×C42
FrattiniC2×C42C22×D79
FittingC79×#1458C2
socleC22×C79C4×C22⋊C4
prime radicalC24×C79C42
cosocleC2×C42×C79C23
hypercenter#1458D79
hypocenterC79#8158
LCSG ▷ C23×C79 ▷ C2×C79 ▷ C79
UCSC1 ◁ C2×C4 ◁ C2×C42 ◁ #1458

400 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 127
transitive degreeμt(G) = 5056

A minimal faithful permutation representation — 3 generators on 127 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)(81,86)(85,91)(87,93)(92,95)(96,99,100,110,101,111,112,123)(97,103,104,116,105,117,118,126)(98,107,109,122,108,121,113,124)(102,114,115,125,106,119,120,127);(80,82,83,88,84,89,90,94)(81,85,87,92,86,91,93,95)(96,98)(97,102,105,106)(99,107)(100,109)(101,108)(103,114,117,119)(104,115,118,120)(110,122)(111,121)(112,113)(116,125,126,127)(123,124);(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)(82,85)(83,87)(84,86)(88,92)(89,91)(90,93)(94,95)(96,97,100,104,101,105,112,118)(98,106,109,120,108,102,113,115)(99,103,110,116,111,117,123,126)(107,119,122,127,121,114,124,125)

Polycyclic presentation:

2^8,79|a^2=e,b^2=f,c^2=e,e^2=g,f^2=h,b^a=bd,c^a=ch,f^a=fg,i^a=i^78,d^b=dg,i^c=i^78

Conjugacy classes & character table

1780 conjugacy classes. The character table is too large to display.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(20224, 60106);