- n=100-300k, 23k left (4, 50, 74, 82, 116, 128, 196, 212, 228, 254, 298, 328, 344, 394, 412, 452, 472, 478, 538, 542, 622, 634, 658)
- runtime 9min-2h (AVX@3.8Ghz)

416*647^33330-1 found by Johnny Rotten
598*647^33951-1 found by Johnny Rotten
94*647^35643-1 found by [AF>France>Ouest>Normandie]The Stress Man (-:
380*647^48780-1 found by LCB001
178*647^58827-1 found by Adrian Schori
418*647^65555-1 found by Senilix
314*647^109740-1 found by Science United
624*647^134475-1 found by Science United