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 2021-02-13, 07:33 #6 bur   Aug 2020 2·5·17 Posts VBCurtis, yes, I'm using sr1sieve which was the fastest among the various srsieves for this task. Good advice to feed candidates from the sieve to LLR testing. I guess I would remove all those candidates that are faster to LLR than to sieve? And a general question, sometimes the LLR task will have to be interrupted (updates, etc). Is there a better way to continue afterwards than manually checking lresults for progress and removing those numbers from the LLR input file? Can it somehow check automatically which numbers are already tested in lresults? kar-bon, of course you're right. Fortunately, I only missed it when copying from my excel sheet and not a genuine miss. Still a bit embarassing... ;) Since I can't edit the original post anymore, here's the updated version of the table: Results Code: For n < 1 000 000 n = digits 2 7 (not a Proth) 142 49 202 67 242 79 370 118 578 180 614 191 754 233 6430 1942 7438 2246 7894 2383 10474 3159 11542 3481 45022 13559 46802 14095 70382 21194 74938 22565 367310 110578 485014 146010