Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C2 |
No aliases for this group.
| Sylow | C5 ⋊ #2227 |
130 conjugacy classes of subgroups; only the 55 normal subgroups are shown.
This group has 130 conjugacy classes of subgroups — too many to draw. Only its 55 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 640 |
Polycyclic presentation:
2^7,5|a^2=d,b^2=dg,c^2=g,e^2=fg,f^2=g,b^a=bdg,c^a=ce,e^a=ef,f^a=fg,e^c=ef,f^c=fg,h^c=h^473 conjugacy classes — view the full character table.
| maximal subgroup of | #12013112, #12013113, #12013119, … |
| maximal normal subgroup of | #12013112, #12013113, #12013119, … |
| maximal quotient of | #12015343, #12015898, #12016968, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 4265);