Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C4 |
No aliases for this group.
| Sylow | C5 ⋊ #1922 |
186 conjugacy classes of subgroups; only the 77 normal subgroups are shown.
This group has 186 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) = 160 |
Polycyclic presentation:
2^7,5|a^2=f,b^2=f,c^2=d,e^2=g,f^2=g,b^a=bd,c^a=ce,e^a=eg,h^a=h^4,e^c=eg118 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#1922, C2×#10600692, #12101548, … |
| maximal normal subgroup of | D5×#1922, C2×#10600692, #12101548, … |
| maximal quotient of | #11997417, #11997424, #11997431, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 2774);