Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C26 |
No aliases for this group.
| Fitting | C5×#385 ⋊ C2 |
| Sylow | C5 ⋊ #2361 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini | C23 | C23×D5 |
| commutator | C22×C5 | C23×C4 |
| Fitting | C5×#385 | C2 |
| socle, cosocle | C23×C5 | C24 |
| prime radical | C2×#4030 | C2 |
| hypercenter | #385 | D5 |
| hypocenter | C5 | #2361 |
| LCS | G ▷ C22×C5 ▷ C5 | |
| UCS | C1 ◁ C23 ◁ #385 | |
788 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=g,b^2=eg,d^2=e,b^a=be,c^a=cf,h^a=h^4,d^b=de,h^c=h^4,h^d=h^4106 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#2361, C2×#10606128, #12258863, … |
| maximal normal subgroup of | D5×#2361, C2×#10606128, #12258863, … |
| maximal quotient of | #12020714, #12020792, #12020801, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 8210);