Elliptic Curve Rank Leaderboard

Obtained by a rational 2-isogeny from curve #15, submitted by David Renshaw: https://elliptic-rank.icarm.cloud/curve/15. The source commentary attributes the original curve y^2 = x^3 - 856967076*x to Wiman (1945), via Dujella's elliptic-curve rank-record tables. Applied the standard degree-2 isogeny with kernel generated by (0,0), followed by the rational change of coordinates dividing x by 4 and y by 8. With A = -856967076, the combined map is X = (x^2+A)/(4*x), Y = y*(x^2-A)/(8*x^2), giving y^2 = x^3 + 214241769*x. Four 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 13711473216. Source-attributed existing curve.