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%I #17 Jun 08 2016 00:02:08
%S 1,27,1325,6375,6899,13445
%N Numbers n such that 6*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(6*14^n-1) \\ _Charles R Greathouse IV_, Jun 08 2016
%K nonn,more
%O 0,2
%A _Jack P. Eisenmann_, May 23 2016