Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C2×C42 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| Sylow | C5 ⋊ #1778 |
220 conjugacy classes of subgroups; only the 92 normal subgroups are shown.
This group has 220 conjugacy classes of subgroups — too many to draw. Only its 92 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=f,c^2=de,d^2=g,e^2=g,f^2=g,b^a=bd,c^a=cg,d^b=dg,e^b=eg,h^b=h^2,h^f=h^464 conjugacy classes — view the full character table.
| maximal subgroup of | #13025929, #13026055, C2×#10603888, … |
| maximal normal subgroup of | #13025929, #13026055, C2×#10603888, … |
| maximal quotient of | #13017302, #13017303, #13017306, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 5970);