Fiber t = -23005/4407 of Elkies' rank-17 elliptic K3 fibration (arXiv:2608.25406). Found by a Mestre-Nagao sieve over t = a/b followed by a 2-covering (fake 2-descent) point search on deep-hole cosets of the rank-17 Mordell-Weil lattice; 17 points are specializations of the generic sections, 11 were found on the coverings. Search run by Claude (Anthropic) with Seth Lupo, 2026-09-02.
Mundoamundo · 2026-09-02 17:05:36 UTC