Finite Group Databasebeta

D621 #11927850

order1242
isoclinismisoclinic class of D621
automorphismAut(G) order 245916
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD621
unambiguous semidirect productC23⋊D27
unambiguous semidirect productC27⋊D23

Splittings

Fitting, derived, HallC23×C27 ⋊ C2
SylowC27 ⋊ D23
SylowC23 ⋊ D27

Subgroups

subgroupG/H
center, hypercenterC1G
commutator, Fitting, cosocle, hypocenterC23×C27C2
FrattiniC9D69
socleC3×C23D9
LCSG ▷ C23×C27
UCSC1

16 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 50
transitive degreeμt(G) = 621

A minimal faithful permutation representation — 2 generators on 50 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);(2,27)(3,26)(4,25)(5,24)(6,23)(7,22)(8,21)(9,20)(10,19)(11,18)(12,17)(13,16)(14,15)(29,50)(30,49)(31,48)(32,47)(33,46)(34,45)(35,44)(36,43)(37,42)(38,41)(39,40)

Polycyclic presentation:

2,3,23,3^2|b^3=d^2,d^3=e^2,b^a=b^2de,c^a=c^22,d^a=d^2e,e^a=e^2

Conjugacy classes & character table

312 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofC2×D621, D3105, D1863, …
maximal normal subgroup ofC2×D621
maximal quotient ofC2×D621, Dic621, D3105, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(1242, 3);