Finite Group Databasebeta

D628 #11929438

order1256
automorphismAut(G) order 195936
homologyAbelianization (H1) = C22 · Schur multiplier (H2) = C2

Aliases

dihedralD628
unambiguous semidirect productC4⋊D157

Splittings

FittingC4×C157 ⋊ C2
SylowC157 ⋊ D4

Subgroups

subgroupG/H
center, FrattiniC2C2×D157
commutator, socle, cosocleC2×C157C22
FittingC4×C157C2
hypercenterC4D157
hypocenterC157D4
LCSG ▷ C2×C157 ▷ C157
UCSC1 ◁ C2 ◁ C4

16 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 161
transitive degreeμt(G) = 628

A minimal faithful permutation representation — 2 generators on 161 points:

(1,2,3,4)(5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161);(2,4)(6,161)(7,160)(8,159)(9,158)(10,157)(11,156)(12,155)(13,154)(14,153)(15,152)(16,151)(17,150)(18,149)(19,148)(20,147)(21,146)(22,145)(23,144)(24,143)(25,142)(26,141)(27,140)(28,139)(29,138)(30,137)(31,136)(32,135)(33,134)(34,133)(35,132)(36,131)(37,130)(38,129)(39,128)(40,127)(41,126)(42,125)(43,124)(44,123)(45,122)(46,121)(47,120)(48,119)(49,118)(50,117)(51,116)(52,115)(53,114)(54,113)(55,112)(56,111)(57,110)(58,109)(59,108)(60,107)(61,106)(62,105)(63,104)(64,103)(65,102)(66,101)(67,100)(68,99)(69,98)(70,97)(71,96)(72,95)(73,94)(74,93)(75,92)(76,91)(77,90)(78,89)(79,88)(80,87)(81,86)(82,85)(83,84)

Polycyclic presentation:

2^3,157|b^a=bc,d^a=d^156,d^b=d^156

Conjugacy classes & character table

317 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#14578939, D1256, #14578941, …
maximal normal subgroup of#14578939, D1256, #14578941, …
maximal quotient of#14578931, C4⋊Dic157, D1256, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(1256, 10);