Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C25 |
No aliases for this group.
| Sylow | C5 ⋊ #1787 |
592 conjugacy classes of subgroups; only the 133 normal subgroups are shown.
This group has 592 conjugacy classes of subgroups — too many to draw. Only its 133 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=f,b^2=g,d^2=g,b^a=bd,c^a=ce,d^a=dg,d^b=dg,h^b=h^494 conjugacy classes — view the full character table.
| maximal subgroup of | #11990970, #11990974, #11990980, … |
| maximal normal subgroup of | #11990970, #11990974, #11990980, … |
| maximal quotient of | #11990670, #11990683, #11990744, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 2400);