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A237418
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Primes of the form 4^k + 15.
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2
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19, 31, 79, 271, 1039, 4111, 65551, 4194319, 67108879, 1073741839, 4294967311, 1099511627791, 4398046511119, 70368744177679, 4722366482869645213711, 75557863725914323419151
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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65551 is a term because 4^8 + 15 = 65551 is prime.
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MATHEMATICA
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Select[Table[4^n + 15, {n, 1, 200}], PrimeQ]
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PROG
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(Magma) [a: n in [1..70] | IsPrime(a) where a is 4^n+15];
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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