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A322952
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Numbers k such that 321*2^k+1 is prime.
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0
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1, 5, 32, 68, 109, 128, 133, 212, 241, 653, 776, 1339, 1787, 2659, 6388, 6547, 8365, 16699, 62861, 64795, 83227, 195376, 278875, 442480, 542876, 730321, 1168576, 1257859, 1629307
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OFFSET
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1,2
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LINKS
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MAPLE
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select(n->isprime(321*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018
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MATHEMATICA
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Select[Range[1000], PrimeQ[321*2^# + 1] &] (* Robert Price, Dec 31 2018 *)
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CROSSREFS
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KEYWORD
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nonn,more,hard
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AUTHOR
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STATUS
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approved
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