A273519 - OEIS

%I #14 Jun 08 2016 00:02:06

%S 1,3,5,7,9,21,39,59,99,323,331,359,617,2529

%N Numbers n such that 7*14^n-1 is prime.

%H J. Brillhart, D. H. Lehmer and J. L. Selfridge, <a href="http://dx.doi.org/10.1090/S0025-5718-1975-0384673-1">New primality criteria and factorizations of 2^m+-1</a>, Math. Compl. 29 (1975) 620-647.

%H John Eisenmann, <a href="http://ostracodfiles.com/primes14/primes.php">Prime Numbers of the Form a * 14^b - 1</a>.

%H Victor Shoup, <a href="http://www.shoup.net/ntb/ntb-v2.pdf">A Computational Introduction to Number Theory and Algebra</a>, 2008, page 348.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/LucasSequence.html">Lucas Sequence</a>.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Rabin-MillerStrongPseudoprimeTest.html">Rabin-Miller Strong Pseudoprime Test</a>.

%o (PARI) is(n)=ispseudoprime(7*14^n-1) \\ _Charles R Greathouse IV_, Jun 08 2016

%K nonn,more

%O 0,2

%A _Jack P. Eisenmann_, May 23 2016