Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C23 |
No aliases for this group.
| Fitting | C2×C5×#107 ⋊ C2 |
| Sylow | C5 ⋊ #2076 |
256 conjugacy classes of subgroups; only the 81 normal subgroups are shown.
This group has 256 conjugacy classes of subgroups — too many to draw. Only its 81 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=e,c^2=dg,e^2=g,b^a=bd,c^a=ce,c^b=cf,h^b=h^4,e^c=eg88 conjugacy classes — view the full character table.
| maximal subgroup of | #12012516, #12012521, #12012526, … |
| maximal normal subgroup of | #12012516, #12012521, #12012526, … |
| maximal quotient of | #12004006, #12004016, #12004040, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 3512);