Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C2×C42 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| Fitting | C5×#108 ⋊ C4 |
| Sylow | C5 ⋊ #1778 |
220 conjugacy classes of subgroups; only the 88 normal subgroups are shown.
This group has 220 conjugacy classes of subgroups — too many to draw. Only its 88 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 80 |
Polycyclic presentation:
2^7,5|a^2=e,b^2=f,c^2=de,d^2=g,e^2=g,f^2=g,b^a=bd,c^a=cg,h^a=h^2,d^b=dg,e^b=eg,h^c=h^3,h^e=h^458 conjugacy classes — view the full character table.
| maximal subgroup of | #13025930, #13025931, #13025932, … |
| maximal normal subgroup of | #13025930, #13025931, #13025932, … |
| maximal quotient of | #13017304, #13017305, #13017308, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 6168);