Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C2 |
No aliases for this group.
| Sylow | C5 ⋊ #2255 |
120 conjugacy classes of subgroups.
| transitive degree | μt(G) = 640 |
Polycyclic presentation:
2^7,5|a^2=d,b^2=d,c^2=ef,e^2=fg,f^2=g,b^a=bd,c^a=ce,e^a=ef,f^a=fg,h^a=h^4,c^b=cg106 conjugacy classes — view the full character table.
| maximal subgroup of | #12013306, #12013307, #12013313, … |
| maximal normal subgroup of | #12013306, #12013307, #12013313, … |
| maximal quotient of | #12015745, #12017340, #12017345, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 1944);