Message boards : Science : base R217 (2k)
- n=300-500k, 2k left (1376, 2642) - runtime 57min-2h32min (AVX@3.8Ghz) 4416*217^229737-1 found by grcpool.com-3 (TOP5000) 3792*217^255934-1 found by CharityEngine2 (TOP5000)