Finite Group Databasebeta

C2×D139 #10587809

order556
isoclinismisoclinic class of D139
automorphism?
homologyAbelianization (H1) = C22 · Schur multiplier (H2) = C2

Aliases

dihedralD278
direct productC2×D139
unambiguous semidirect productC139⋊C22
unambiguous semidirect product(C2×C139)⋊C2

Splittings

Fitting, socleC2×C139 ⋊ C2
derived, SylowC139 ⋊ C22

Subgroups

subgroupG/H
center, hypercenterC2D139
commutator, cosocle, hypocenterC139C22
FrattiniC1G
Fitting, socleC2×C139C2
LCSG ▷ C139
UCSC1 ◁ C2

10 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 141
transitive degreeμt(G) = 278

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

Conjugacy classes & character table

142 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofC4×D139, C22⋊D139, D556, …
maximal normal subgroup ofC4×D139, C22⋊D139, D556, …
maximal quotient ofC4×D139, C2×Dic139, C22⋊D139, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(556, 3);