Repeated-3 fiber construction for 1863=27*69=3^4*23. Four independent size-6 witness fibers modulo 69 are placed over the size-4 low witness {0,1,5,6} modulo 27, then fiber-aware perturbation creates a fifth low-residue fiber and yields 25 points, beating the 4*6=24 Cartesian-product baseline.
Yongxi (Aaron) Lin · 2026-08-07 14:36:52 UTC