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 A249383 Smallest odd prime number Q such that Q*2^P-1 is also prime with P Mersenne prime exponent A000043(n). 2
 3, 3, 7, 3, 31, 7, 61, 43, 79, 19, 739, 103, 2707, 4513, 139, 13, 4027, 28027, 14029, 87151, 11257, 8677, 122449, 104161, 113287, 216211, 150097, 862009, 876721, 414949, 4590451, 1391281 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(32) is a 227838-digit certified prime. Does a(n) exist for each n? - Charles R Greathouse IV, Oct 28 2014 LINKS Table of n, a(n) for n=1..32. PROG (PARI) lista(nn) = {vmp = readvec("b000043.txt"); for (n=1, nn, k=2; while(!isprime(prime(k)*2^vmp[n]-1), k++); print1(prime(k), ", "); ); } \\ Michel Marcus, Oct 27 2014 CROSSREFS Cf. A000043, A249382, A249384. Sequence in context: A324048 A100587 A324548 * A187419 A099282 A002937 Adjacent sequences: A249380 A249381 A249382 * A249384 A249385 A249386 KEYWORD nonn AUTHOR Pierre CAMI, Oct 27 2014 STATUS approved

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Last modified September 15 03:44 EDT 2024. Contains 375931 sequences. (Running on oeis4.)