Finite Group Databasebeta

#34197446

order20224
automorphism?
homologyAbelianization (H1) = C22×C8 · Schur multiplier (H2) = C23

Aliases

No aliases for this group.

Splittings

SylowC79 ⋊ #11453

Subgroups

subgroupG/H
centerC22C2×#14579075
commutatorC23×C79C22×C8
FrattiniC2×C22⋊C4C22×D79
FittingC2×#323×C79C2
socleC22×C79C2×#99
prime radicalC25×C79C2×C4
cosocleC2×C22⋊C4×C79C23
hypercenterC2×#323D79
hypocenterC79#11453
LCSG ▷ C23×C79 ▷ C22×C79 ▷ C2×C79 ▷ C79
UCSC1 ◁ C22 ◁ C24 ◁ C22×C22⋊C4 ◁ C2×#323

562 conjugacy classes of subgroups; only the 115 normal subgroups are shown.

normal subgroups only

This group has 562 conjugacy classes of subgroups — too many to draw. Only its 115 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) = 103
transitive degreeμt(G) = 2528

A minimal faithful permutation representation — 3 generators on 103 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)(90,97)(93,102)(96,103)(98,100);(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)(88,90)(89,93,95,102)(91,100)(92,97)(94,103,99,96)(98,101);(80,81,82,84,83,85,86,87)(88,89)(90,96)(91,99,101,94)(92,95)(93,98,102,100)(97,103)

Polycyclic presentation:

2^8,79|a^2=e,b^2=f,e^2=g,b^a=bd,d^a=df,f^a=fh,c^b=ch,d^b=dh,e^b=ef,i^b=i^78,e^d=eh

Conjugacy classes & character table

1762 conjugacy classes. The character table is too large to display.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(20224, 78745);