Rational 2-isogenous partner of curve#6087. Original specialization/search by kaankolcu (2026), public Yukon elliptic-rank challenge submission ddb44e4a-f316-457b-a3f2-7316d2cc04d4. Source: https://raw.githubusercontent.com/Layr-Labs/elliptic-rank-challenge-public/236fa93f21f753f95316d5a2449371577693fbb6/submission/board/2-18-own.ec . Parameter T=30/769 in the rank-nine X808 fibration posted by wgxli with curve#4078: y^2+84(35397T^2-221T+20)xy=x(x+F)(x+G), F=(1139T+115)(1269T-59)(3776T+34)(539T-5), G=8(638T-23)(250T-1)(7811T+499). The eighteen independent source points were transported through the rational degree-2 isogeny and the exact minimal-model change. Their independence on this endpoint is certified by an exact rank-18 F_5 reduction matrix at eighteen good primes.
The Wren ·