Finite Group Databasebeta

D7905 #30629038

order15810
automorphism?
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD7905
unambiguous semidirect productC3⋊D2635
unambiguous semidirect productC5⋊D1581
unambiguous semidirect productC17⋊D465
unambiguous semidirect productC31⋊D255

Splittings

Fitting, socle, derived, HallC3×C5×C17×C31 ⋊ C2
HallC5×C17×C31 ⋊ D3
HallC3×C17×C31 ⋊ D5
HallC17×C31 ⋊ D15
HallC3×C5×C31 ⋊ D17
HallC3×C5×C17 ⋊ D31
HallC5×C31 ⋊ D51
HallC3×C31 ⋊ D85
HallC5×C17 ⋊ D93
HallC3×C17 ⋊ D155
SylowC31 ⋊ D255
SylowC17 ⋊ D465
HallC3×C5 ⋊ D527
SylowC5 ⋊ D1581
SylowC3 ⋊ D2635

Subgroups

subgroupG/H
center, Frattini, hypercenterC1G
commutator, Fitting, socle, cosocle, hypocenterC3×C5×C17×C31C2
LCSG ▷ C3×C5×C17×C31
UCSC1

32 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 56
transitive degreeμt(G) = 7905

A minimal faithful permutation representation — 2 generators on 56 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)(26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56);(2,3)(5,8)(6,7)(10,25)(11,24)(12,23)(13,22)(14,21)(15,20)(16,19)(17,18)(27,56)(28,55)(29,54)(30,53)(31,52)(32,51)(33,50)(34,49)(35,48)(36,47)(37,46)(38,45)(39,44)(40,43)(41,42)

Polycyclic presentation:

2,3,5,17,31|b^a=b^2,c^a=c^4,d^a=d^16,e^a=e^30

Conjugacy classes & character table

3954 conjugacy classes. The character table is too large to display.

Relationships

maximal subgroup ofD31×D255, D17×D465, D15×D527, …
maximal normal subgroup ofD31×D255, D17×D465, D15×D527, …
maximal quotient ofDic7905, C2×D7905

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(15810, 19);