Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C25 · Schur multiplier (H2) = C28 |
No aliases for this group.
| Fitting | C22×C42×C5 ⋊ C2 |
| Sylow | C5 ⋊ #3444 |
| subgroup | G/H | |
|---|---|---|
| center | C42 | C22×D5 |
| commutator, socle, cosocle | C22×C5 | C25 |
| Frattini | C22 | C24×D5 |
| Fitting | C22×C42×C5 | C2 |
| hypercenter | C22×C42 | D5 |
| hypocenter | C5 | #3444 |
| LCS | G ▷ C22×C5 ▷ C5 | |
| UCS | C1 ◁ C42 ◁ C22×C42 | |
1212 conjugacy classes of subgroups; only the 509 normal subgroups are shown.
This group has 1212 conjugacy classes of subgroups — too many to draw. Only its 509 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|d^2=g,e^2=f,b^a=bf,c^a=cg,h^a=h^4184 conjugacy classes — view the full character table.
| maximal subgroup of | #12065811, #12065814, #12065834, … |
| maximal normal subgroup of | #12065811, #12065814, #12065834, … |
| maximal quotient of | #12257602, #12257708, C4×#66125, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 19663);