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A281549
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Numbers n such that abs(n - 4^k) is prime for k = 1..10.
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1
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525, 635, 3335, 22547, 132725, 242073, 590663, 598793, 795143, 963815, 1910433, 2506647, 5833497, 13032533, 13336685, 22163097, 22291055, 27730755, 36069767, 39412953, 41006745, 42520623, 44594457, 47869577, 63735185, 73770483, 76852937, 89703543, 100998105
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OFFSET
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1,1
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LINKS
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EXAMPLE
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For n = 525, the primes are {521, 509, 461, 269, 499, 3571, 15859, 65011, 261619, 1048051}.
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MATHEMATICA
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AA = Table[PrimeQ[Abs[n - 4^k]], {n, 1, 150000}, {k, 1, 10}];
Flatten[Position[AA, {True, True, True, True, True, True, True, True, True, True}]]
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PROG
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(PARI) is(n)=for(k=1, 10, if(!isprime(abs(n-4^k)), return(0))); 1
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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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