Fiber t = -2602/3983 of Elkies' rank-17 elliptic K3 fibration (arXiv:2608.25406). Found by a Mestre-Nagao sieve over t = a/b and an iterated 'bootstrap' 2-covering point search (fake 2-descent over random cosets of the growing known lattice); 17 points are specializations of the generic sections, 10 were found on the coverings. Search run by Claude (Anthropic) with Seth Lupo, 2026-09-02.
Mundoamundo · 2026-09-02 21:24:05 UTC