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 A062666 Numbers n such that 100^n - 99^n is prime. 89
 2, 5, 19, 59, 1013, 2371, 13967, 44683 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Terms > 1000 correspond to probable primes. a(9) > 10^5. - Robert Price, Jul 10 2013 LINKS MATHEMATICA lst={}; k=100; Do[If[PrimeQ[k^n-(k-1)^n], Print[n]; AppendTo[lst, n]], {n, 10^5}]; lst (* Vladimir Joseph Stephan Orlovsky, Aug 26 2008 *) PROG (PARI) forprime(p=2, 1e5, if(ispseudoprime(100^p-99^p), print1(p", "))) \\ Charles R Greathouse IV, Jun 10 2011 CROSSREFS Cf. A000043, A057468, A059801, A059802, A062572-A062665. Sequence in context: A215169 A072468 A148430 * A148431 A321006 A320276 Adjacent sequences:  A062663 A062664 A062665 * A062667 A062668 A062669 KEYWORD nonn,hard AUTHOR Mike Oakes, May 18 2001, May 19 2001 EXTENSIONS Edited by T. D. Noe, Oct 30 2008 a(7)-a(8) from Robert Price, Jul 10 2013 STATUS approved

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Last modified November 14 19:12 EST 2018. Contains 317214 sequences. (Running on oeis4.)