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A108254
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Numbers k such that little googol - k is prime.
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2
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15, 99, 153, 183, 267, 285, 357, 479, 603, 833, 843, 879, 1107, 1125, 1187, 1235, 1289, 1295, 1683, 1757, 1763, 1833, 1863, 1905, 1929, 1943, 1977, 2609, 2699, 2709, 2933, 2973, 2975, 2999, 3027, 3135, 3183, 3237, 3347, 3375, 3485, 3503, 3507, 3555, 3647
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OFFSET
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1,1
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COMMENTS
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A little googol = 2^100.
The sequence is finite with between 1.8559e29 and 1.8562e29 members. Under the Riemann Hypothesis, it has between 1.8560140176089e29 and 1.8560140176096e29 members. - Charles R Greathouse IV, Jul 30 2007
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LINKS
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Amiram Eldar, Table of n, a(n) for n = 1..10000
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MATHEMATICA
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Select[Range[4000], PrimeQ[2^100 - #] &] (* Amiram Eldar, Dec 26 2019 *)
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PROG
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(PARI) g(n) = forstep(x=1, n, 2, if(isprime(2^100-x), print1(x", ")))
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CROSSREFS
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Cf. A108253.
Sequence in context: A278203 A159528 A108681 * A174383 A341396 A307158
Adjacent sequences: A108251 A108252 A108253 * A108255 A108256 A108257
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KEYWORD
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nonn,fini
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AUTHOR
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Cino Hilliard, Jun 18 2005
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STATUS
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approved
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