Message boards : Science : base R754 (15k)
- n=100-300k, 15k left (134, 171, 206, 254, 321, 341, 344, 389, 411, 444, 461, 510, 564, 966, 999) - 12min-1h58min (AVX@3.8Ghz) 509*754^58046-1 found by nenym