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 A108049 Integers n such that 10^n+43 is a prime number. 27
 1, 5, 37, 253, 1129, 1441, 35393 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(8) > 10^5. - Robert Price, Nov 01 2013 See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10043". LINKS Makoto Kamada, List of near-repdigit-related prime numbers. EXAMPLE n = 5 is 10^5+43 = 100043, which is prime. MATHEMATICA Select[Range[2*10^3], PrimeQ[10^#+43]&] - Vladimir Joseph Stephan Orlovsky, Apr 29 2008 PROG (PARI) is(n)=ispseudoprime(10^n+43) \\ Charles R Greathouse IV, Apr 28 2015 CROSSREFS Cf. A049054, A088274, A088275. Sequence in context: A183385 A054417 A080507 * A121141 A220634 A083232 Adjacent sequences:  A108046 A108047 A108048 * A108050 A108051 A108052 KEYWORD nonn,more AUTHOR Julien Peter Benney (jpbenney(AT)ftml.net), Jun 01 2005 EXTENSIONS a(7)=35393 from Robert Price, Mar 16 2010 Edited by Ray Chandler, Dec 23 2010 STATUS approved

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Last modified October 21 22:47 EDT 2019. Contains 328315 sequences. (Running on oeis4.)