| - n=400-500k, 9k left (267, 408, 599, 806, 863, 1101, 1136, 1143, 1296)- runtime 1h45min-2h48min (AVX@3.8Ghz)
 
 632*268^113226-1 found by CharityEngine2
 872*268^251714-1 found by CharityEngine1 (TOP5000)
 1061*268^229202-1 found by CharityEngine2 (TOP5000)
 1061*268^323645-1 found by CharityEngine1 (TOP5000)
 291*268^452750-1 found by IDEA (TOP5000)
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