Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| Sylow | C5 ⋊ #1496 |
246 conjugacy classes of subgroups; only the 60 normal subgroups are shown.
This group has 246 conjugacy classes of subgroups — too many to draw. Only its 60 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=e,c^2=f,d^2=f,e^2=g,b^a=bd,c^a=cg,d^a=df,h^a=h^2,c^b=cfg,d^b=df,h^c=h^4,h^e=h^446 conjugacy classes — view the full character table.
| maximal subgroup of | #13017944, #13017946, #13017957, … |
| maximal normal subgroup of | #13017944, #13017946, #13017957, … |
| maximal quotient of | #13015109, #13015113, #13015116, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 6689);