Exact computational full 2- and 3-torsion family at (p,q)=(-21,1); Velu quotient by rational order-3 subgroup. The mapped rank >=1 witness is non-torsion by the original exact 2-descent Kummer certificate and finite isogeny kernel. Conductor N=6930; local exponents {'2': 1, '3': 2, '5': 1, '7': 1, '11': 1}.
Natanael Wildner Fraga ·