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Old 2008-08-27, 12:31   #10
robert44444uk
 
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Jun 2003
Oxford, UK

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Quote:
Originally Posted by davieddy View Post
Why the prevalence of k2^n + 1 over k2^n - 1
among non-Mersennes?
I believe that the programmes available at that time did not favour -1 cases. LLR came much later.
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