Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| Sylow | C5 ⋊ #1989 |
260 conjugacy classes of subgroups; only the 99 normal subgroups are shown.
This group has 260 conjugacy classes of subgroups — too many to draw. Only its 99 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=f,b^2=deg,c^2=efg,d^2=g,e^2=g,f^2=g,b^a=bd,c^a=cef,d^b=dg,e^b=eg,f^b=fg,h^c=h^494 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#1989, C2×#10599594, #12103811, … |
| maximal normal subgroup of | D5×#1989, C2×#10599594, #12103811, … |
| maximal quotient of | #11999287, #11999292, #11999431, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 1676);