Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C23 |
No aliases for this group.
| Sylow | C5 ⋊ #2143 |
220 conjugacy classes of subgroups; only the 62 normal subgroups are shown.
This group has 220 conjugacy classes of subgroups — too many to draw. Only its 62 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,d^2=fg,e^2=g,f^2=g,b^a=bd,d^a=df,f^a=fg,h^a=h^2,c^b=cg,d^b=df,f^b=fg,h^e=h^446 conjugacy classes — view the full character table.
| maximal subgroup of | #13025922, #13025929, #13026251, … |
| maximal normal subgroup of | #13025922, #13025929, #13026251, … |
| maximal quotient of | #13023689, #13023691, #13023694, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 6940);