Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C24 |
No aliases for this group.
| Fitting | C5×#125 ⋊ C4 |
| Sylow | C5 ⋊ #2336 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini | C22 | C23×AGL(1,𝔽5) |
| commutator, socle | C22×C5 | C23×C4 |
| Fitting | C5×#125 | C4 |
| prime radical, cosocle | C22×D5 | C24 |
| hypercenter | #125 | AGL(1,𝔽5) |
| hypocenter | C5 | #2336 |
| LCS | G ▷ C22×C5 ▷ C5 | |
| UCS | C1 ◁ C22 ◁ #125 | |
428 conjugacy classes of subgroups.
| transitive degree | μt(G) = 160 |
Polycyclic presentation:
2^7,5|a^2=g,b^2=g,c^2=e,d^2=ef,b^a=be,c^a=cf,d^a=de,h^a=h^2,c^b=ce,h^b=h^3,h^g=h^458 conjugacy classes — view the full character table.
| maximal subgroup of | #13020262, #13020263, #13020266, … |
| maximal normal subgroup of | #13020262, #13020263, #13020266, … |
| maximal quotient of | #13027957, #13027970, #13027977, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 19427);