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A133281
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Numbers k such that k + googol is a lower twin prime.
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3
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35737, 58291, 59257, 63361, 87079, 138277, 141979, 175831, 178897, 219979, 365491, 394681, 413497, 503209, 558187, 599197, 655051, 730321, 747751, 757189, 763369, 788617, 831079, 861331, 865417, 870247, 900199, 947881, 1038217, 1081801, 1131037, 1165201, 1182229
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OFFSET
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1,1
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COMMENTS
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For k > 219979, k + a googol is a probable prime.
For each of the 28 terms listed, the Magma Calculator (http://magma.maths.usyd.edu.au/calc/) verified that both 10^100 + a(n) and 10^100 + a(n) + 2 were prime. - Jon E. Schoenfield, Aug 24 2009
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LINKS
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Amiram Eldar, Table of n, a(n) for n = 1..1000
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FORMULA
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Googol = 10^100.
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MATHEMATICA
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Select[Range[10^6], And @@ PrimeQ[10^100 + # + {0, 2}] &] (* Amiram Eldar, Dec 26 2019 *)
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PROG
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(PARI) googol(n) = { local(x, a, j); x=10^100; forstep(j=1, 1000000, 2, a=x+j; if(ispseudoprime(a)&ispseudoprime(a+2), print1(j", "); ); ) }
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CROSSREFS
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Cf. A001097, A001359, A006512, A133282.
Sequence in context: A156405 A065611 A101252 * A326320 A216065 A236201
Adjacent sequences: A133278 A133279 A133280 * A133282 A133283 A133284
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KEYWORD
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nonn
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AUTHOR
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Cino Hilliard, Oct 13 2007
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EXTENSIONS
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More terms from Amiram Eldar, Dec 26 2019
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STATUS
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approved
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