Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C2×C4 · Schur multiplier (H2) = C1 |
No aliases for this group.
| Sylow | C5 ⋊ #1355 |
88 conjugacy classes of subgroups.
| transitive degree | μt(G) = 80 |
Polycyclic presentation:
2^7,5|a^2=d,c^2=f,d^2=e,e^2=g,b^a=bc,c^a=ce,f^a=fg,h^a=h^4,c^b=cf,d^b=defg,e^b=eg,d^c=dg52 conjugacy classes — view the full character table.
| maximal subgroup of | #11987139, #11987140, #11987142, … |
| maximal normal subgroup of | #11987139, #11987140, #11987142, … |
| maximal quotient of | #11986078, #11986116, #11986467, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 356);