Obtained by a rational 2-isogeny from curve #4767, submitted by David Renshaw: https://elliptic-rank.icarm.cloud/curve/4767.
The source commentary identifies #4767 as a 2-isogenous model of a curve listed in Aguirre, Castañeda and Peral, High rank elliptic curves with torsion group Z/(2Z), Mathematics of Computation 73 (2004), 323–331: https://doi.org/10.1090/S0025-5718-03-01547-3.
Applied the standard degree-2 isogeny with kernel generated by (0,0), sending y^2 = x^3 + A*x to y^2 = x^3 - 4*A*x. Here A = 303523956992981037543615, giving y^2 = x^3 - 1214095827971924150174460*x. The coordinate map is X = (x^2+A)/x, Y = y*(x^2-A)/x^2.
Twelve supplied rational points transported through this map and checked exactly on the target curve. Rational torsion C2. Same rank and conductor as the source; conductor 327561928777518231048733993255374727655208064800. Source-attributed existing curve.
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