Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C25 |
| direct product | C2×#65405 |
| Sylow | C5 ⋊ C2×#467 |
512 conjugacy classes of subgroups; only the 181 normal subgroups are shown.
This group has 512 conjugacy classes of subgroups — too many to draw. Only its 181 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 320 |
172 conjugacy classes — view the full character table.
| maximal subgroup of | #11998814, #11998816, #11998824, … |
| maximal normal subgroup of | #11998814, #11998816, #11998824, … |
| maximal quotient of | C2×#10601643, C2×#10601646, C2×#10601648, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 17557);