2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/94634In 1987, Zagier and Kramarz published a paper in which they presented evidence that a positive proportion of the even-signed cubic twists of the elliptic curve $x^3+y^3=1$ should have positive rank. We extend their data, showing that it is more likely that the proportion goes to zero.Number Theorytext