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A140560
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Primes p such that p + 30 is not a prime.
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1
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2, 3, 5, 19, 47, 61, 89, 103, 113, 131, 139, 157, 173, 179, 191, 223, 229, 257, 269, 271, 293, 311, 313, 331, 347, 373, 383, 397, 421, 439, 443, 463, 467, 487, 499, 503, 509, 521, 523, 593, 599, 607, 619, 641, 659, 673, 677, 683, 691, 701, 719, 733, 751, 761
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OFFSET
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1,1
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LINKS
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MAPLE
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MATHEMATICA
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Select[Prime[Range[200]], !PrimeQ[#+30]&] (* Harvey P. Dale, Oct 21 2013 *)
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PROG
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(Magma)[p: p in PrimesUpTo(1000)|not IsPrime(p+30)] // Vincenzo Librandi, Dec 18 2010
(PARI) isok(n) = isprime(n) && !isprime(n+30); \\ Michel Marcus, Apr 14 2017
(Python)
from sympy import isprime, primerange
print([p for p in primerange(1, 1001) if not isprime(p + 30)]) # Indranil Ghosh, Apr 14 2017
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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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