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 A108365 Integers n such that 10^n - 39 is prime. 0
 2, 5, 6, 12, 17, 19, 61, 102, 195, 447, 1250, 1329, 1935, 3930, 5837, 7176, 8724, 20881, 23936, 61868, 91920 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The next term, if one exists, is >100000. [From Robert Price, Apr 25 2011] See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "99961". LINKS Makoto Kamada, List of near-repdigit-related prime numbers. EXAMPLE If n=2 then 10^n - 39 = 61 (prime). If n=61 then 10^n - 39 = 9999999999999999999999999999999999999999999999999999999999961 (prime). CROSSREFS Cf. A108330, A108328. Sequence in context: A085206 A238481 A058601 * A064765 A257805 A082552 Adjacent sequences:  A108362 A108363 A108364 * A108366 A108367 A108368 KEYWORD more,nonn AUTHOR Parthasarathy Nambi, Jul 01 2005 EXTENSIONS a(8)-a(12) from Stefan Steinerberger, Nov 05 2005 a(13)-a(19) from Robert Price, Dec 12 2010 Edited by Ray Chandler, Dec 23 2010 a(20)=61868, a(21)=91920 from Robert Price, Apr 25 2011 STATUS approved

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Last modified November 15 01:39 EST 2018. Contains 317224 sequences. (Running on oeis4.)