Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C25 |
No aliases for this group.
| Fitting | C5×#576 ⋊ C2 |
| Sylow | C5 ⋊ #3288 |
| subgroup | G/H | |
|---|---|---|
| center | C2 | D4×C22⋊D5 |
| commutator, cosocle | C2×C4×C5 | C24 |
| Frattini | C2×C4 | C23×D5 |
| Fitting | C5×#576 | C2 |
| socle | C2×C5 | D42 |
| hypercenter | #576 | D5 |
| hypocenter | C5 | #3288 |
| LCS | G ▷ C2×C4×C5 ▷ C2×C5 ▷ C5 | |
| UCS | C1 ◁ C2 ◁ C2×C4 ◁ #576 | |
464 conjugacy classes of subgroups.
| transitive degree | μt(G) = 80 |
Polycyclic presentation:
2^7,5|e^2=g,f^2=g,b^a=be,c^a=cf,e^a=eg,f^a=fg,h^a=h^4,d^b=de,e^b=eg,f^c=fg,e^d=eg70 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#3288, C2×#10615740, #12975495, … |
| maximal normal subgroup of | D5×#3288, C2×#10615740, #12975495, … |
| maximal quotient of | #12088643, #12088647, #12088656, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 17822);