Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C22×C4 · Schur multiplier (H2) = C25 |
No aliases for this group.
| Fitting | C5×#408 ⋊ C2 |
| Sylow | C5 ⋊ #1794 |
548 conjugacy classes of subgroups; only the 97 normal subgroups are shown.
This group has 548 conjugacy classes of subgroups — too many to draw. Only its 97 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 160 |
Polycyclic presentation:
2^7,5|a^2=f,d^2=g,f^2=g,b^a=bd,c^a=ce,d^a=dg,d^b=dg,e^b=eg,h^b=h^4,d^c=dg88 conjugacy classes — view the full character table.
| maximal subgroup of | #11986664, #11986666, #11986667, … |
| maximal normal subgroup of | #11986664, #11986666, #11986667, … |
| maximal quotient of | #11990698, #11990703, #11990708, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 2885);