Finite Group Databasebeta

#34204121

order20224
automorphism?
homologyAbelianization (H1) = C22×C4 · Schur multiplier (H2) = C25

Aliases

No aliases for this group.

Splittings

FittingC79×#2122 ⋊ C2
SylowC79 ⋊ #12769

Subgroups

subgroupG/H
centerC2#23763346
commutatorC2×D4×C79C22×C4
FrattiniC2×#41C22×D79
FittingC79×#2122C2
socleC2×C79#1790
prime radical#23777803C2
cosocleC2×#41×C79C23
hypercenter#2122D79
hypocenterC79#12769
LCSG ▷ C2×D4×C79 ▷ C22×C79 ▷ C2×C79 ▷ C79
UCSC1 ◁ C2 ◁ C2×C4 ◁ C2×#41 ◁ #2122

856 conjugacy classes of subgroups; only the 103 normal subgroups are shown.

normal subgroups only

This group has 856 conjugacy classes of subgroups — too many to draw. Only its 103 normal subgroups are shown.

Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.

Full subgroup data →

Presentation

minimal degreeμ(G) = 95
transitive degreeμt(G) = 1264

A minimal faithful permutation representation — 3 generators on 95 points:

(1,3)(2,8)(4,12)(5,6)(7,13)(9,11)(10,16)(14,15)(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);(2,7)(4,14)(8,13)(9,16)(10,11)(12,15)(17,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,95,93,91,89,87,85,83,81,79,77,75,73,71,69,67,65,63,61,59,57,55,53,51,49,47,45,43,41,39,37,35,33,31,29,27,25,23,21,19);(1,2,5,7,6,10,3,11)(4,13,15,8,14,9,12,16)

Polycyclic presentation:

2^8,79|a^2=f,f^2=h,b^a=bd,c^a=ce,d^a=dg,e^a=eh,g^a=gh,e^b=egh,f^b=fg,d^c=dg,f^c=fh,i^c=i^78,e^d=eh,f^d=fh

Conjugacy classes & character table

931 conjugacy classes — view the full character table.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(20224, 85420);