Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C2×C42 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| Sylow | C5 ⋊ #1771 |
272 conjugacy classes of subgroups; only the 137 normal subgroups are shown.
This group has 272 conjugacy classes of subgroups — too many to draw. Only its 137 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=e,b^2=f,c^2=de,e^2=g,b^a=bd,c^a=cg,h^a=h^4,h^b=h^4,h^c=h^4136 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#1771, C2×#10601260, #12097246, … |
| maximal normal subgroup of | D5×#1771, C2×#10601260, #12097246, … |
| maximal quotient of | #11990436, #11990442, #11990447, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 3342);