Finite Group DatabasebetaFinite Group Databasebeta| order | 648 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of D4 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C81 · Schur multiplier (H2) = C2 |
| direct product | D4×C81 |
| unambiguous semidirect product | C4⋊(C2×C81) |
| subgroup | G/H | |
|---|---|---|
| center | C2×C81 | C22 |
| commutator | C2 | C22×C81 |
| Frattini, cosocle | C2×C27 | C22×C3 |
| socle | C2×C3 | C22×C27 |
| prime radical | C3×D4 | C27 |
| LCS | G ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C2×C81 ◁ G | |
40 conjugacy classes of subgroups.
| minimal degree | μ(G) = 85 |
| transitive degree | μt(G) = 324 |
A minimal faithful permutation representation — 2 generators on 85 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);(2,4)405 conjugacy classes — view the full character table.
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(648, 10);