Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C24 |
No aliases for this group.
| Fitting | C5×#423 ⋊ C2 |
| Sylow | C5 ⋊ #2991 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini | C2×C4 | C23×D5 |
| commutator, socle | C22×C5 | C23×C4 |
| Fitting | C5×#423 | C2 |
| prime radical | C2×#709 | C4 |
| cosocle | C2×C4×C5 | C24 |
| hypercenter | #423 | D5 |
| hypocenter | C5 | #2991 |
| LCS | G ▷ C22×C5 ▷ C5 | |
| UCS | C1 ◁ C2×C4 ◁ #423 | |
394 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=f,d^2=e,f^2=g,b^a=be,c^a=cg,d^a=de,c^b=ceg,h^b=h^4106 conjugacy classes — view the full character table.
| maximal subgroup of | #11993576, #11993580, #11993590, … |
| maximal normal subgroup of | #11993576, #11993580, #11993590, … |
| maximal quotient of | #12098140, #12098141, #12098320, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 12865);