Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C23×C4 |
No aliases for this group.
| Sylow | C5 ⋊ #2720 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini | C23 | C23×D5 |
| commutator, socle, cosocle | C23×C5 | C24 |
| Fitting | C5×#399 | C2 |
| prime radical | C24×C5 | C23 |
| hypercenter | #399 | D5 |
| hypocenter | C5 | #2720 |
| LCS | G ▷ C23×C5 ▷ C5 | |
| UCS | C1 ◁ C23 ◁ #399 | |
472 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=e,b^2=ef,c^2=f,d^2=e,b^a=be,c^a=cf,d^a=def,c^b=cg,d^b=de,h^b=h^4,h^c=h^4,h^d=h^476 conjugacy classes — view the full character table.
| maximal subgroup of | #12306731, #12306745, #12306767, … |
| maximal normal subgroup of | #12306731, #12306745, #12306767, … |
| maximal quotient of | #12026998, #12027172, #12027235, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 11881);