Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C25 |
No aliases for this group.
| Fitting | C5×#575 ⋊ C2 |
| Sylow | C5 ⋊ #3067 |
| subgroup | G/H | |
|---|---|---|
| center | C4 | #4085 |
| commutator, cosocle | C2×C4×C5 | C24 |
| Frattini | C2×C4 | C23×D5 |
| Fitting | C5×#575 | C2 |
| socle | C2×C5 | C2×#121 |
| hypercenter | #575 | D5 |
| hypocenter | C5 | #3067 |
| LCS | G ▷ C2×C4×C5 ▷ C2×C5 ▷ C5 | |
| UCS | C1 ◁ C4 ◁ C22×C4 ◁ #575 | |
452 conjugacy classes of subgroups.
| transitive degree | μt(G) = 160 |
Polycyclic presentation:
2^7,5|b^2=e,d^2=g,e^2=g,f^2=g,b^a=be,c^a=cf,e^a=eg,f^a=fg,h^b=h^4,f^c=fg76 conjugacy classes — view the full character table.
| maximal subgroup of | #12106235, #12106236, #12106246, … |
| maximal normal subgroup of | #12106235, #12106236, #12106246, … |
| maximal quotient of | #12081539, #12081567, #12081607, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 17814);