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A053356
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Numbers k such that 279*2^k + 1 is prime.
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0
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2, 5, 10, 67, 70, 185, 218, 254, 530, 539, 587, 767, 806, 1142, 1169, 2098, 3035, 4310, 8909, 14150, 15461, 15778, 15962, 16711, 17819, 41915, 78578, 90047, 274202, 335351, 430342, 888782, 1465658, 1526518, 2079167
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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[279*2^# + 1] &] (* G. C. Greubel, May 24 2018 *)
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PROG
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(Magma) [n: n in [1..300] | IsPrime(279*2^n+1)]; // G. C. Greubel, May 24 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(27)-a(34) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 20 2018
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STATUS
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approved
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