Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C23×C42 |
No aliases for this group.
| Sylow | C5 ⋊ #2858 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini | C23 | C23×D5 |
| commutator, socle, cosocle | C23×C5 | C24 |
| Fitting, prime radical | C2×C5×#127 | C2 |
| hypercenter | C2×#127 | D5 |
| hypocenter | C5 | #2858 |
| LCS | G ▷ C23×C5 ▷ C5 | |
| UCS | C1 ◁ C23 ◁ C2×#127 | |
752 conjugacy classes of subgroups; only the 197 normal subgroups are shown.
This group has 752 conjugacy classes of subgroups — too many to draw. Only its 197 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|b^2=g,c^2=f,d^2=e,b^a=be,c^a=cf,d^a=dg,h^b=h^4,h^d=h^4100 conjugacy classes — view the full character table.
| maximal subgroup of | #11998351, #11998361, #11998366, … |
| maximal normal subgroup of | #11998351, #11998361, #11998366, … |
| maximal quotient of | #12030491, #12030573, #12030640, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 16997);