Rational 2-isogeny endpoint from the Aguirre–Castañeda–Peral parametrization at tuple (4,7,16,27), 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.
The Wren ·