Finite Group Databasebeta

#34205756

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

Aliases

No aliases for this group.

Splittings

FittingC79×#1781 ⋊ C2
SylowC79 ⋊ #13082

Subgroups

subgroupG/H
centerC22C2×#14579075
commutatorC24×C79C22×C4
FrattiniC22×D4C22×D79
FittingC79×#1781C2
socleC22×C79C2×#99
prime radical#23766710C2
cosocleC22×D4×C79C23
hypercenter#1781D79
hypocenterC79#13082
LCSG ▷ C24×C79 ▷ C22×C79 ▷ C2×C79 ▷ C79
UCSC1 ◁ C22 ◁ C24 ◁ C23×D4 ◁ #1781

1088 conjugacy classes of subgroups; only the 107 normal subgroups are shown.

normal subgroups only

This group has 1088 conjugacy classes of subgroups — too many to draw. Only its 107 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) = 91
transitive degreeμt(G) = 2528

A minimal faithful permutation representation — 3 generators on 91 points:

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

Polycyclic presentation:

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

Conjugacy classes & character table

1285 conjugacy classes. The character table is too large to display.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(20224, 87055);