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 A171719 Numbers n such that 10^n*(8+3*10^n)+3 is prime. 0
 1, 2, 4, 8, 17, 517, 581, 665, 890, 4901, 5230, 7515 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Values corresponding to n=4901, n=5230, and n=7515 were all certified Fermat and Lucas PRPs with WinPFGW and the latter two (>10k digits) were submitted to Lifchitz's Top PRPs database. No more terms up to n=8100. LINKS Table of n, a(n) for n=1..12. PROG (PARI) is(n)=ispseudoprime(10^n*(8+3*10^n)+3) \\ Charles R Greathouse IV, Jun 13 2017 CROSSREFS Sequence in context: A231435 A113153 A255999 * A185178 A351471 A229718 Adjacent sequences: A171716 A171717 A171718 * A171720 A171721 A171722 KEYWORD more,nonn AUTHOR Jason Earls, Dec 16 2009 STATUS approved

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Last modified December 2 16:47 EST 2023. Contains 367525 sequences. (Running on oeis4.)