Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C4×C8 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| Sylow | C5 ⋊ #1275 |
152 conjugacy classes of subgroups; only the 77 normal subgroups are shown.
This group has 152 conjugacy classes of subgroups — too many to draw. Only its 77 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=d,b^2=e,c^2=f,d^2=g,e^2=f,b^a=bc,e^a=ef,d^b=df,h^b=h^4124 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#1275, C2×#10598231, #11988717, … |
| maximal normal subgroup of | D5×#1275, C2×#10598231, #11988717, … |
| maximal quotient of | #11985826, #11985835, #11985837, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 313);