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Obtained by a rational 2-isogeny from curve #4897, submitted by Ritik Jain: https://elliptic-rank.icarm.cloud/curve/4897. The source model is y^2 + x*y = x^3 - 10455088461805561*x + 334576760664626995112441. Its public entry supplies eleven rational points and no commentary identifying an earlier source. Applied the degree-2 isogeny with kernel generated by the rational order-2 point (78797594, -39398797), then converted the target to its minimal model y^2 + x*y = x^3 - 51315558652604281*x - 4173012684548591147038855. Eleven 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 350994032023955239500892170090. Source-attributed existing curve.