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Old 2010-05-07, 14:54   #4
kar_bon
 
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Mar 2006
Germany

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Quote:
Originally Posted by science_man_88 View Post
this what you want ?
No, I think not!

Those small twins are all known (see list at download or the summary-pages).

He was asking of higher n-levels say n~500000 for any prime of the form k*2^n-1.
Test those k/n-pairs if the number k*2^n+1 is prime, too! The Riesel-side (-1) is known to be prime for many values here but none has ever tested the '+1'-side!
OTOH the chance for finding a new twin by testing only these primes is very low.

Last fiddled with by kar_bon on 2010-05-07 at 14:54
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