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Old 2007-03-03, 20:33   #1
roger
 
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Oct 2006

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Default Heavy k program for k.2^n+-1

I have heard mentioned that there is a program for searching for primes with large k values, but cannot find the program name or who mentioned it.

The reason I ask is because Proth can only do k values up to 2<sup>31</sup>-1. Could someone point me in the right direction, please?

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Old 2007-03-03, 23:23   #2
Cruelty
 
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Old 2007-03-06, 07:22   #3
robert44444uk
 
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Default pfgw, newpgen

Roger, pfgw will take very large k, as large as you like!

The problem might come with sieving if k is a large prime. Where k factors, then you can enter k in Newpgen as a multiple of the factors, getting over any size restrictions.
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