Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C8 · Schur multiplier (H2) = C22 |
No aliases for this group.
| Sylow | C5 ⋊ #2171 |
144 conjugacy classes of subgroups; only the 58 normal subgroups are shown.
This group has 144 conjugacy classes of subgroups — too many to draw. Only its 58 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 160 |
Polycyclic presentation:
2^7,5|a^2=e,c^2=e,d^2=g,e^2=f,f^2=g,b^a=bd,c^a=cg,d^a=dg,h^a=h^2,d^b=dg,h^b=h^4,h^c=h^3,h^e=h^458 conjugacy classes — view the full character table.
| maximal subgroup of | #13025282, #13025283, #13025284, … |
| maximal normal subgroup of | #13025282, #13025283, #13025284, … |
| maximal quotient of | #13025168, #13025205, #13025209, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 6166);