Finite Group DatabasebetaFinite Group Databasebeta| order | 1280 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of D4 |
| automorphism | ? |
| homology | Abelianization (H1) = C2×C5×C82 · Schur multiplier (H2) = C22×C8 |
| direct product | C5×C8×C4⋊C8 |
| unambiguous semidirect product | C4⋊(C5×C82) |
| subgroup | G/H | |
|---|---|---|
| center | C2×C4×C5×C8 | C22 |
| commutator | C2 | C2×C5×C82 |
| Frattini, cosocle | C2×C42 | C23×C5 |
| socle, prime radical | C23×C5 | C2×C42 |
| LCS | G ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C2×C4×C5×C8 ◁ G | |
550 conjugacy classes of subgroups.
| minimal degree | μ(G) = 25 |
| transitive degree | μt(G) = 1280 |
A minimal faithful permutation representation — 3 generators on 25 points:
(1,2,3,4,5)(6,7,8,9,10,11,12,13);(15,17)(18,19,20,22,21,23,24,25);(14,15,16,17)800 conjugacy classes — view the full character table.
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(1280, 1247);