Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C25 |
No aliases for this group.
| Sylow | C5 ⋊ #2935 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini | C2×C4 | C23×D5 |
| commutator, socle | C22×C5 | C23×C4 |
| Fitting, prime radical | C5×#532 | C2 |
| cosocle | C2×C4×C5 | C24 |
| hypercenter | #532 | D5 |
| hypocenter | C5 | #2935 |
| LCS | G ▷ C22×C5 ▷ C5 | |
| UCS | C1 ◁ C2×C4 ◁ #532 | |
492 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=f,c^2=f,f^2=g,b^a=be,h^a=h^4,d^b=dg,d^c=dg,h^c=h^4106 conjugacy classes — view the full character table.
| maximal subgroup of | #11993774, #11993778, #11993788, … |
| maximal normal subgroup of | #11993774, #11993778, #11993788, … |
| maximal quotient of | #12071058, #12071068, #12071077, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 17090);