Finite Group DatabasebetaFinite Group Databasebeta| order | 320 |
| nilpotency class | 2 |
| isoclinism | isoclinic class of D4 |
| automorphism | Aut(G) = C2×C4×#131 (order 256) · Inn(G) = C22 · Out(G) = C22×C42 |
| homology | Abelianization (H1) = C2×C5×C16 · Schur multiplier (H2) = C1 |
| direct product | C5×M64 |
| subgroup | G/H | |
|---|---|---|
| center | C5×C16 | C22 |
| commutator | C2 | C2×C5×C16 |
| Frattini, cosocle | C16 | C22×C5 |
| socle | C2×C5 | C2×C16 |
| prime radical | C22×C5 | C16 |
| LCS | G ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C5×C16 ◁ G | |
32 conjugacy classes of subgroups.
| minimal degree | μ(G) = 37 |
| transitive degree | μt(G) = 160 |
A minimal faithful permutation representation — 2 generators on 37 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);(7,23)(9,25)(11,27)(13,29)(15,31)(17,33)(19,35)(21,37)200 conjugacy classes — view the full character table.
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(320, 175);