Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C8 · Schur multiplier (H2) = C22 |
No aliases for this group.
| Sylow | C5 ⋊ #2150 |
172 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=e,b^2=d,e^2=f,f^2=g,b^a=bd,c^a=cg,h^a=h^2,h^b=h^4,h^e=h^488 conjugacy classes — view the full character table.
| maximal subgroup of | #13013709, #13013713, #13013921, … |
| maximal normal subgroup of | #13013709, #13013713, #13013921, … |
| maximal quotient of | #13025033, #13025059, #13025088, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 6790);