Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C22 |
No aliases for this group.
| Sylow | C5 ⋊ #1566 |
184 conjugacy classes of subgroups; only the 78 normal subgroups are shown.
This group has 184 conjugacy classes of subgroups — too many to draw. Only its 78 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,b^2=d,d^2=f,e^2=g,b^a=bd,c^a=cg,d^a=df,h^a=h^2,h^e=h^476 conjugacy classes — view the full character table.
| maximal subgroup of | #13013739, #13013745, #13013812, … |
| maximal normal subgroup of | #13013739, #13013745, #13013812, … |
| maximal quotient of | #13015384, #13017296, #13017297, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 6778);