Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C8 · Schur multiplier (H2) = C22 |
No aliases for this group.
| Fitting | C5×#504 ⋊ C2 |
| Sylow | C5 ⋊ #2170 |
146 conjugacy classes of subgroups; only the 65 normal subgroups are shown.
This group has 146 conjugacy classes of subgroups — too many to draw. Only its 65 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=e,c^2=e,d^2=g,e^2=f,f^2=g,b^a=bd,d^a=dg,h^a=h^4,d^b=dg136 conjugacy classes — view the full character table.
| maximal subgroup of | #12019861, #12019862, #12019866, … |
| maximal normal subgroup of | #12019861, #12019862, #12019866, … |
| maximal quotient of | C16×#686, #12011015, C16×#687, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 4327);