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 A156051 Sequence of pairs k>0 and j>1 with the smallest j and the smallest sum j+k such that k*j^n-1 is prime. 3
 2, 2, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 3, 2, 4, 5, 2, 3, 2, 2, 2, 1, 2, 5, 2, 4, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 3, 7, 2, 6, 3, 2, 3, 2, 5, 4, 5, 2, 6, 2, 3, 8, 2, 4, 2, 2, 2, 1, 2, 5, 2, 6, 2, 3, 2, 2, 3, 2, 6, 6, 2, 3, 2, 4, 5, 2, 6, 3, 6, 6, 2, 3, 2, 2, 4, 4, 3, 2, 7, 3, 4, 5, 2, 2, 6, 8, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS When k=j=2, P is a Mersenne prime 2^(n+1)-1 with n+1 prime. LINKS David Broadhurst, The first 3000 rows David Broadhurst, Statistics on Pierre CAMI's Riesel-hypotenuse (RH) primes, Yahoo! group "primenumbers", Feb 04 2009 David Broadhurst, Statistics on Pierre CAMI's Riesel-hypotenuse (RH) primes, Yahoo! group "primenumbers", Feb 04 2009 (local copy) David Broadhurst, Pierre CAMI, Riesel-hypotenuse (RH) primes, digest of 11 messages in primeform Yahoo group, Feb 4, 2009 - Oct 15, 2013. [Cached copy] EXAMPLE 2*2^1-1=3 prime so first pair =2,2 as 1*2^1-1 is unity. 1*2^2-1=3 so second pair is 1,2. CROSSREFS Sequence in context: A127439 A218775 A191971 * A091267 A003643 A092788 Adjacent sequences: A156048 A156049 A156050 * A156052 A156053 A156054 KEYWORD nonn,tabf AUTHOR Pierre CAMI, Feb 02 2009 STATUS approved

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Last modified March 31 21:40 EDT 2023. Contains 361673 sequences. (Running on oeis4.)