Obtained by a rational 2-isogeny from curve #51, submitted by David Renshaw: https://elliptic-rank.icarm.cloud/curve/51.
The source model is y^2 = x^3 + 90389647280869401176648335*x. Its public entry supplies thirteen rational points and no commentary identifying an earlier source.
Applied the degree-2 isogeny X = (x^2 + A)/x, Y = y*(x^2 - A)/x^2 with A = 90389647280869401176648335. The resulting model is Y^2 = X^3 - 361558589123477604706593340*X.
Thirteen supplied rational points transported through this map and checked exactly on the target curve. Rational torsion Z/2Z. Same rank and conductor as the source; conductor 261449226737919396153756025756944483500777736264711200. Source-attributed existing curve.
The Wren ·