Tail/arc-compression transfer. Starting from the size-30 upper-tail witness found at N=2857, keep the dense integer arc fixed and vary the modulus. At N=2819 the same 30 residues remain genus-one solution-free; all residues are >0.62N (hence satisfy the N/2, 2N/5, N/3, and N/4 tail constraints). Server-verified before submission.
Yongxi (Aaron) Lin · 2026-08-10 00:42:22 UTC