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Old 2009-01-17, 03:21   #113
gd_barnes's Avatar
May 2007
Kansas; USA

1052510 Posts

Originally Posted by MyDogBuster View Post
In order to avoid a crunch on sieving, I'd think about starting a very very low intensity sieve of 1005-2000 n=500K-1MM. We will probably have to sieve to about 24-26T so getting started now would be wise.

Agreed totally. Actually, we thought far ahead on the n=600K-1M for k=400-1001 range and it was done several months before we got there but I totally misanticipated the speed at which the 5000th-place prime would rise to n>350K for the current range. PrimeGrid, searching in a style similar to our own for n=400K-500K on the Proth side, had a lot to do with that.

Now that you mention it, I'll start some sieving on one core for that within a couple of days and progress slowly. The low P-ranges take much longer and the file is very huge to start with but once it nears P=1T, then it's more manageable as a group effort.

This method of searching for primes is definitely the way to go in the future.

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