Finite Group Databasebeta

C2×D6985 #43241682

order27940
automorphism?
homologyAbelianization (H1) = C22 · Schur multiplier (H2) = C2

Aliases

dihedralD13970
direct productC2×D6985
unambiguous semidirect product(C2×C5)⋊D1397
unambiguous semidirect product(C2×C11)⋊D635
unambiguous semidirect product(C2×C127)⋊D55

Splittings

Fitting, socleC2×C5×C11×C127 ⋊ C2
derived, HallC5×C11×C127 ⋊ C22
HallC11×C127 ⋊ C2×D5
HallC5×C127 ⋊ C2×D11
SylowC127 ⋊ C2×D55
HallC5×C11 ⋊ C2×D127
SylowC11 ⋊ C2×D635
SylowC5 ⋊ C2×D1397

Subgroups

subgroupG/H
center, hypercenterC2D6985
commutator, cosocle, hypocenterC5×C11×C127C22
FrattiniC1G
Fitting, socleC2×C5×C11×C127C2
LCSG ▷ C5×C11×C127
UCSC1 ◁ C2

40 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 145
transitive degreeμt(G) = 13970

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

Conjugacy classes & character table

6988 conjugacy classes. The character table is too large to display.

Relationships

maximal subgroup ofD27940
maximal normal subgroup ofD27940
maximal quotient ofDic13970, D27940

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(27940, 36);