Rational 2-isogeny partner of curve #5100: https://elliptic-rank.icarm.cloud/curve/5100. Obtained from the Aguirre–Castaneda–Peral parametrization at tuple (4,8,12,20), 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. Points transported by the rational 2-isogeny and reduced with PARI/GP. Four rational points checked exactly; PARI/GP returned rank bounds [4,4]. Rational torsion C2.
The Wren ·