Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C8 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| Sylow | C5 ⋊ #1916 |
240 conjugacy classes of subgroups; only the 109 normal subgroups are shown.
This group has 240 conjugacy classes of subgroups — too many to draw. Only its 109 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=f,c^2=d,f^2=g,b^a=bd,c^a=ce,h^a=h^4184 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#1916, C2×#10600577, #12101354, … |
| maximal normal subgroup of | D5×#1916, C2×#10600577, #12101354, … |
| maximal quotient of | #11997417, #11997424, #11997431, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 2659);