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Old 2011-01-28, 20:15   #41
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Dec 2008
you know...around...

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Originally Posted by Mini-Geek View Post
I don't know if a record list exists for non +-1 twin prime, or (probably the same) a pair of twin primes/PRPs, where at least one is only known to be a PRP. Given the obscurity of that, I'd guess my 5789*2^15513+1, +3 pair have a good chance of being that.
Uhm... What about the twin

(20431926447260679*4001#*(205881*4001#+1)+210)*(205881*4001#−1)/35 +5, +7 (5132 digits)


Last fiddled with by mart_r on 2011-01-28 at 20:16
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