2-isogenous quotient of curve#3392 by the rational 2-torsion point (-74,0). Torsion Z/4Z; PARI/GP ellrank gives [4,4,0], so the rank is exactly 4. The four witnesses are the images of the independent witnesses of curve#3392 under the degree-2 isogeny. Naive height 54.7321239517, improving the previous Z/4Z rank>=4 naive-height record 55.3300822300 in the 2026-09-27 catalogue.
jesper-petersen ·