Mixed-radix sum-set construction from the record witnesses for N=287 (size 14) and N=150 (size 10): A = A_287 + 287 A_150 in Z/(287*150). Validity follows by reducing any solution first mod 287, forcing the 287-digits equal, then mod 150 on the remaining digits.
Yongxi (Aaron) Lin · 2026-08-08 03:53:44 UTC