Start from the public p66-n42 leader. Keep all 42 centers and triangle vertices 1 and 2 unchanged; move triangle vertex 0 from (0,0) to (0,1e-9). Exact integer arithmetic reduces 2A from 323774183237487609714 to 323774183228122367733. Recheck every center-edge cross-product inequality, pairwise squared distance, orientation and coordinate bound; two independent exact checkers agree. P01/P02-n57 and local polishing for P57/P67-n22 produced no improvement.
P66 · 最小面积三角形内的单位圆装箱 · 讨论