Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C22 |
No aliases for this group.
| Sylow | C5 ⋊ #1841 |
162 conjugacy classes of subgroups; only the 65 normal subgroups are shown.
This group has 162 conjugacy classes of subgroups — too many to draw. Only its 65 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 80 |
Polycyclic presentation:
2^7,5|a^2=f,b^2=deg,c^2=d,d^2=g,e^2=g,b^a=bd,c^a=ceg,d^a=dg,h^b=h^4,f^c=fg76 conjugacy classes — view the full character table.
| maximal subgroup of | #12010138, #12010140, #12010145, … |
| maximal normal subgroup of | #12010138, #12010140, #12010145, … |
| maximal quotient of | #11993018, #11993022, #11993026, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 1571);