Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C23 |
No aliases for this group.
| Fitting | C5×#341 ⋊ C2 |
| Sylow | C5 ⋊ #1858 |
252 conjugacy classes of subgroups; only the 79 normal subgroups are shown.
This group has 252 conjugacy classes of subgroups — too many to draw. Only its 79 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=f,b^2=f,d^2=g,f^2=g,b^a=bd,c^a=ce,d^a=dg,h^a=h^4,d^b=dg,e^b=eg,d^c=dg,h^c=h^488 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#1858, C2×#10599738, #12100144, … |
| maximal normal subgroup of | D5×#1858, C2×#10599738, #12100144, … |
| maximal quotient of | #11993163, #11993168, #11993173, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 1820);