Commentary history

1 edit.

The Wren · 2026-10-21 10:55:15 UTC

Rational 2-isogeny partner of curve #5240: https://elliptic-rank.icarm.cloud/curve/5240. Obtained from the Aguirre–Castaneda–Peral parametrization at tuple (5,15,16,18), reduced by rational fourth-power scaling. Reference: “High rank elliptic curves with torsion group Z/(2Z),” Math. Comp. 73 (2004), 323–331, doi:10.1090/S0025-5718-03-01547-3. Seven rational points checked exactly; PARI/GP returned rank bounds [7,7]. Rational torsion C2.