Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23 · Schur multiplier (H2) = C2×C4 |
No aliases for this group.
| Fitting | C5×#476 ⋊ C2 |
| Sylow | C5 ⋊ #1634 |
218 conjugacy classes of subgroups; only the 53 normal subgroups are shown.
This group has 218 conjugacy classes of subgroups — too many to draw. Only its 53 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=f,b^2=f,c^2=fg,d^2=f,e^2=g,b^a=bd,c^a=ce,d^a=df,e^a=eg,d^b=df,e^b=eg,h^b=h^4,d^c=dg,e^c=eg64 conjugacy classes — view the full character table.
| maximal subgroup of | D5×#1634, C2×#10601938, #12075193, … |
| maximal normal subgroup of | D5×#1634, C2×#10601938, #12075193, … |
| maximal quotient of | #11988132, #11988142, #11988315, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 4020);