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A175236
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Primes p such that 2^p+23 is also prime.
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1
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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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For p=3, 2^3+23=31; p=7, 2^7+23=131; p=79, 2^79+23=604462909807314587353111
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MATHEMATICA
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Select[Prime[Range[1000]], PrimeQ[2^#+23]&] (*Robert Price, Sep 18 2015 *)
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PROG
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(Magma) [p: p in PrimesUpTo(1000) | IsPrime(2^p+23) ]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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