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A070527
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Numbers k such that cyclotomic(k, 2^k) is a prime number.
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2
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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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EXAMPLE
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4 is a term because cyclotomic(4,16) = 1 + 16^2 = 257 is prime.
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MATHEMATICA
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Do[s=Cyclotomic[n, 2^n]; If[PrimeQ[s], Print[n]], {n, 1, 1000}]
Select[Range[150], PrimeQ[Cyclotomic[#, 2^#]]&] (* Harvey P. Dale, Aug 12 2023 *)
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PROG
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(PARI) isok(k) = isprime(polcyclo(k, 2^k)); \\ Michel Marcus, Dec 17 2020
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CROSSREFS
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KEYWORD
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more,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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