- n=25-100k, 50k left (6, 276, 1604, 2316, 5142, 6542, 6836, 7472, 7938, 10272, 10290, 11358, 12156, 13332, 13574, 14316, 15224, 15306, 17118, 17292, 17334, 17592, 18474, 18888, 19116, 19350, 20024, 20322, 21198, 21818, 21866, 22086, 22206, 22308, 22452, 23544, 24402, 24918, 25074, 25976, 26604, 26696, 27134, 28530, 28802, 29084, 29544, 29748, 30980, 31064)
- runtime 37s-11min (AVX@3.8Ghz)

10068*553^25141-1 found by LCB001
7104*553^25331-1 found by LCB001
18512*553^27358-1 found by vaughan
17492*553^27814-1 found by NeuralMiner
11474*553^28333-1 found by vaughan
22026*553^28527-1 found by vaughan
6224*553^29092-1 found by vaughan
3228*553^29433-1 found by LCB001
11394*553^32236-1 found by NeuralMiner
13484*553^32777-1 found by Stef42
10746*553^32843-1 found by vaughan
3002*553^35055-1 found by vaughan
22818*553^36777-1 found by NeuralMiner
22436*553^37906-1 found by vaughan
10994*553^38301-1 found by vaughan
29732*553^39971-1 found by LCB001
20892*553^39982-1 found by McShane of TSBT
31244*553^42192-1 found by McShane of TSBT
14234*553^42415-1 found by NeuralMiner
15014*553^48684-1 found by NeuralMiner
5726*553^48699-1 found by McShane of TSBT
8696*553^51131-1 found by McShane of TSBT
2630*553^55684-1 found by NeuralMiner
31574*553^57719-1 found by damotbe
6458*553^61614-1 found by NeuralMiner
20640*553^65054-1 found by NeuralMiner
7698*553^65661-1 found by NeuralMiner
27188*553^77884-1 found by McShane of TSBT
18126*553^78841-1 found by pons66
20466*553^82546-1 found by Mankka*
15866*553^83923-1 found by Nflight
1512*553^91126-1 found by NeuralMiner
12182*553^93023-1 found by NeuralMiner
1148*553^93737-1 found by SuchFlex.com
25356*553^96266-1 found by adolganov