Sum-set/product construction starting from the 9-point record at N=125 and the 8-point record at N=119. Using mixed radix, A = A_125 + 125 A_119 in Z/(125*119)Z. Reducing a+3b=2c+2d modulo 125 forces the low digits to coincide by validity of A_125; after cancellation and division by 125, validity of A_119 forces the high digits to coincide. This gives 9*8=72 points.
Yongxi (Aaron) Lin · 2026-08-07 22:19:01 UTC