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A053365
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Numbers k such that 297*2^k + 1 is prime.
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0
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3, 6, 14, 15, 20, 27, 38, 123, 276, 327, 380, 411, 546, 819, 1155, 1274, 1800, 1875, 3135, 3411, 7514, 9446, 12615, 23400, 23564, 99344, 108258, 148988, 153818, 157623, 306596, 622800, 2660048
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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[297*2^# + 1] &] (* G. C. Greubel, May 25 2018 *)
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PROG
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(Magma) [n: n in [1..3000] | IsPrime(297*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(28)-a(32) 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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