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A032424
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Numbers k such that 149*2^k+1 is prime.
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0
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3, 7, 9, 15, 17, 27, 33, 35, 57, 125, 127, 137, 191, 513, 819, 827, 921, 931, 1047, 1147, 1599, 1815, 2499, 2995, 8151, 11403, 22783, 29841, 30201, 85935, 142281, 149831, 184457, 221595, 256099, 283881, 333933, 483045, 658917, 714199, 812719, 1295061, 1561951
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OFFSET
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1,1
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COMMENTS
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The subsequence of prime values starts 3, 7, 17, 127, 137, 191, 827, 22783, 714199, ... - Muniru A Asiru, Apr 29 2019
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LINKS
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MAPLE
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select(k->isprime(149*2^k+1), [$0..1000])[]; # Muniru A Asiru, Dec 18 2018
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MATHEMATICA
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Select[Range[1000], PrimeQ[149*2^# + 1] & ] (* Robert Price, Dec 18 2018 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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a(33)-a(43) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 18 2018
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STATUS
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approved
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