Finite Group Databasebeta

#34208496

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

Aliases

No aliases for this group.

Splittings

SylowC79 ⋊ #13562

Subgroups

subgroupG/H
centerC2C2×#19098350
commutatorC2×D4×C79C22×C4
Frattini#127C22×D79
Fitting, prime radicalC79×#3018C2
socleC2×C79C2×AΣL(1,𝔽16)
cosocle#127×C79C23
hypercenter#3018D79
hypocenterC79#13562
LCSG ▷ C2×D4×C79 ▷ C2×C4×C79 ▷ C22×C79 ▷ C2×C79 ▷ C79
UCSC1 ◁ C2 ◁ C2×C4 ◁ C22×C4 ◁ #532 ◁ #3018

490 conjugacy classes of subgroups; only the 79 normal subgroups are shown.

normal subgroups only

This group has 490 conjugacy classes of subgroups — too many to draw. Only its 79 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:

(1,3,5,12)(2,6,9,10)(4,11,14,13)(7,15,16,8)(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)(3,10)(4,7)(5,9)(6,12)(8,11)(13,15)(14,16);(1,2,4,8)(3,6,11,7)(5,9,14,15)(10,13,16,12)(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)

Polycyclic presentation:

2^8,79|a^2=e,c^2=h,f^2=h,b^a=bd,d^a=df,f^a=fg,g^a=gh,i^a=i^78,c^b=ch,e^b=efh,f^b=fh,g^b=gh,e^d=egh,f^d=fh,f^e=fh

Conjugacy classes & character table

1276 conjugacy classes. The character table is too large to display.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(20224, 89795);