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A053360
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Numbers k such that 287*2^k + 1 is a prime.
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0
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3, 27, 59, 291, 699, 1259, 1771, 3051, 19379, 23323, 41459, 121747, 206539, 515827
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Select[Range[5*10^3], PrimeQ[287*2^# + 1] &] (* G. C. Greubel, May 25 2018 *)
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PROG
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(PARI) is(n)=ispseudoprime(287*2^n+1) \\ G. C. Greubel, May 25 2018
(Magma) [n: n in [1..300] | IsPrime(287*2^n+1)]; // G. C. Greubel, May 25 2018
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CROSSREFS
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KEYWORD
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hard,nonn,more
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AUTHOR
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EXTENSIONS
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a(12)-a(14) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 22 2018
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STATUS
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approved
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