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 A265503 Numbers n such that n*2^2203 - 1 is prime. 1
 1, 13, 553, 861, 1983, 2065, 2403, 4371, 6226, 6553, 6580, 10128, 10998, 11193, 12411, 12598, 12909, 13056, 13194, 13399, 14589, 15829, 18429, 18436, 19315, 19900, 21574, 23599, 24006, 24024, 24415, 25704, 27225, 27651, 28689, 29461, 29805, 29868, 31143, 31186, 32674, 33706, 34306, 35016, 36118 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS The exponent of 2 in the expression, 2203, is a Mersenne exponent. LINKS EXAMPLE n = 1 is a term since 2^2203 - 1 is prime (the 16th Mersenne prime). MATHEMATICA Select[Range@ 36200, PrimeQ[# 2^2203 - 1] &] (* Michael De Vlieger, Dec 09 2015 *) PROG (MATLAB) if isprime(n*2^2203-1) disp(n) end (PARI) is(n)=ispseudoprime(n*2^2203-1) \\ Anders HellstrÃ¶m, Dec 09 2015 (MAGMA) [n: n in [1..7*10^3] |IsPrime(n*2^2203-1)]; // Vincenzo Librandi, Dec 10 2015 CROSSREFS Cf. A000043, A001348, A005122. Sequence in context: A143601 A282837 A203360 * A050286 A096761 A076461 Adjacent sequences:  A265500 A265501 A265502 * A265504 A265505 A265506 KEYWORD nonn AUTHOR Vardan Semerjyan, Dec 09 2015 EXTENSIONS More terms from Michael De Vlieger, Dec 09 2015 STATUS approved

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Last modified June 28 04:00 EDT 2022. Contains 354903 sequences. (Running on oeis4.)