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Old 2019-04-30, 22:28   #9
henryzz
Just call me Henry
 
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"David"
Sep 2007
Cambridge (GMT/BST)

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Originally Posted by henryzz View Post
I have started a search for 0 2 6 8 18 20 30 32 36 38 48 50 60 62 78 80. I think this will take a while though. Can anyone prove this is optimal?
I was correct about this taking a while. I have searched 11#*x + 1451 with x upto 1e14 in about 3 hours with no results(best was upto 48). Started a run upto 1e15.
I think I am being a victim here of the numbers getting larger and less likely to be prime as I search deeper.
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