A273519 Numbers n such that 7*14^n-1 is prime.
1, 3, 5, 7, 9, 21, 39, 59, 99, 323, 331, 359, 617, 2529
Offset: 0
Links
- J. Brillhart, D. H. Lehmer and J. L. Selfridge, New primality criteria and factorizations of 2^m+-1, Math. Compl. 29 (1975) 620-647.
- John Eisenmann, Prime Numbers of the Form a * 14^b - 1.
- Victor Shoup, A Computational Introduction to Number Theory and Algebra, 2008, page 348.
- Eric Weisstein's World of Mathematics, Lucas Sequence.
- Eric Weisstein's World of Mathematics, Rabin-Miller Strong Pseudoprime Test.
Programs
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PARI
is(n)=ispseudoprime(7*14^n-1) \\ Charles R Greathouse IV, Jun 08 2016