Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C22 |
No aliases for this group.
| Sylow | C5 ⋊ #2176 |
148 conjugacy classes of subgroups.
| transitive degree | μt(G) = 640 |
Polycyclic presentation:
2^7,5|a^2=e,b^2=g,c^2=e,d^2=fg,f^2=g,b^a=bd,c^a=cg,d^a=df,f^a=fg,h^a=h^4,d^b=df,f^b=fg,h^b=h^4112 conjugacy classes — view the full character table.
| maximal subgroup of | #11986773, #11986775, #12011179, … |
| maximal normal subgroup of | #11986773, #11986775, #12011179, … |
| maximal quotient of | #12011047, #12011246, #12011304, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 1957);