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 A108328 Integers n such that 10^n - 23 is a prime number. 16
 3, 11, 17, 23, 35, 161, 765, 3473, 6887, 27681, 34313 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS No additional terms < 40000. - Robert Price, Dec 13 2010 See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "99977". No other terms < 100,000. - Robert Price, Mar 03 2011 LINKS Makoto Kamada, List of near-repdigit-related prime numbers. EXAMPLE n = 3 is a member because 10^3 - 23 = 1000 - 23 = 977, which is prime. MATHEMATICA lst={}; Do[If[PrimeQ[10^n-23], AppendTo[lst, n]], {n, 0, 10^4}]; lst (* Vladimir Joseph Stephan Orlovsky, Aug 19 2008 *) CROSSREFS Cf. A089675, A095714, A092767. Sequence in context: A165561 A038960 A019397 * A153419 A079020 A118590 Adjacent sequences:  A108325 A108326 A108327 * A108329 A108330 A108331 KEYWORD more,nonn AUTHOR Julien Peter Benney (jpbenney(AT)ftml.net), Jun 30 2005 EXTENSIONS a(9)-a(11) from Robert Price, Dec 13 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.)