Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C26 |
No aliases for this group.
| Fitting | C5×#388 ⋊ C2 |
| Sylow | C5 ⋊ C4×#121 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini | C23 | C23×D5 |
| commutator | C22×C5 | C23×C4 |
| Fitting | C5×#388 | C2 |
| socle, cosocle | C23×C5 | C24 |
| prime radical | C2×#4030 | C2 |
| hypercenter | #388 | D5 |
| hypocenter | C5 | C4×#121 |
| LCS | G ▷ C22×C5 ▷ C5 | |
| UCS | C1 ◁ C23 ◁ #388 | |
824 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=g,b^2=e,d^2=g,b^a=be,c^a=cf,h^b=h^4,h^c=h^4,h^d=h^4112 conjugacy classes — view the full character table.
| maximal subgroup of | C4×D5×#121, C2×#10607183, C4×#65990, … |
| maximal normal subgroup of | C4×D5×#121, C2×#10607183, C4×#65990, … |
| maximal quotient of | #12020446, #12020451, #12020453, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 9265);