Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C25 |
No aliases for this group.
| Fitting | C5×#405 ⋊ C2 |
| Sylow | C5 ⋊ #2957 |
452 conjugacy classes of subgroups.
| transitive degree | μt(G) = 160 |
Polycyclic presentation:
2^7,5|a^2=f,c^2=f,e^2=g,f^2=g,b^a=be,d^a=dg,e^a=eg,h^a=h^4,e^b=eg,h^b=h^4,d^c=dg124 conjugacy classes — view the full character table.
| maximal subgroup of | #12015434, #12015438, #12015441, … |
| maximal normal subgroup of | #12015434, #12015438, #12015441, … |
| maximal quotient of | #12068759, #12068767, #12068775, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 12393);