- n=25-100k, 50k left (2160, 2172, 2478, 2690, 4662, 5240, 12120, 13142, 14964, 17532, 17934, 20540, 22014, 22694, 24614, 25290, 28224, 28794, 28842, 30230, 30324, 30480, 31910, 36452, 38612, 40500, 41904, 43728, 43844, 45092, 48480, 50850, 52430, 53384, 53804, 54294, 55268, 55914, 56070, 57374, 57600, 60234, 62720, 62888, 62958, 64358, 64514, 70262, 72438, 73202)
- runtime 29s-9min (AVX@3.8Ghz)

38118*421^26715-1 found by Jaska*
66968*421^26825-1 found by Ralfy
69662*421^27004-1 found by Ralfy
46994*421^27041-1 found by tito
2534*421^27665-1 found by CoolAtchOk
68798*421^28664-1 found by Adrian Schori
63552*421^29020-1 found by Gattorantolo [Ticino]
43662*421^34330-1 found by Ralfy
30210*421^36409-1 found by Gattorantolo [Ticino]
25470*421^37004-1 found by Gattorantolo [Ticino]
37064*421^39870-1 found by Gattorantolo [Ticino]
17948*421^41074-1 found by Gattorantolo [Ticino]
21734*421^43719-1 found by Mankka*
38624*421^48226-1 found by Jaska*
68472*421^50661-1 found by Mankka*
37112*421^53327-1 found by LCB001
39252*421^57513-1 found by Johnny Rotten
34620*421^61138-1 found by Ralfy
60150*421^64024-1 found by Ralfy
28802*421^64072-1 found by Johnny Rotten
7790*421^66082-1 found by Johnny Rotten
71952*421^70703-1 found by vaughan
72788*421^71038-1 found by Ralfy
8958*421^72815-1 found by Ralfy
17334*421^77784-1 found by Ralfy
30408*421^82078-1 found by Ralfy
21312*421^83093-1 found by Ralfy
34848*421^89339-1 found by vaughan
62054*421^98670-1 found by Ralfy
5864*421^99477-1 found by zombie67 [MM]