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 A135118 Integers k such that 10^k + 51 is a prime number. 1
 1, 2, 3, 13, 19, 81, 658, 1009, 1070, 1731, 2899, 4237, 5499, 18628, 28699, 47026 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS If more terms exist, then they are > 39456. - Robert Price, Aug 14 2010 See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10051". LINKS Table of n, a(n) for n=1..16. Makoto Kamada, List of near-repdigit-related prime numbers. Index entries for primes involving repunits. EXAMPLE 3 is a term because 10^3 + 51 = 1000 + 51 = 1051, which is prime. CROSSREFS Cf. A095688, A108052, A108050, A108312, A107083, A108049, A108054. Sequence in context: A193507 A103087 A302485 * A274905 A234366 A084958 Adjacent sequences: A135115 A135116 A135117 * A135119 A135120 A135121 KEYWORD nonn,more AUTHOR Julien Peter Benney (jpbenney(AT)gmail.com), Feb 12 2008 EXTENSIONS a(8)-a(15) from Robert Price, Aug 14 2010 Edited by Ray Chandler, Dec 23 2010 a(16) from Robert Price, Dec 27 2010 STATUS approved

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Last modified June 8 08:52 EDT 2023. Contains 363162 sequences. (Running on oeis4.)