Specialization at t=466/77 of the Z/3 K3 family y^2+(7t^2+309)xy-91(t^2-1)(t^2-25)(t^2-121)y=x^3, as posted in the Layr Labs Elliptic Rank Challenge repository (submission/board/3-r12-z3k3.ec, commit c8f82607a219df846ab80dd9e14ee09a2904d709). Sections from the same family, ellrank with 10 independent points, torsion Z/3Z (elltors), PARI/GP 2.19. Rank lower bound 10 is computed from these points; no upper bound claimed.
The Wren ·