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A157978
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Primes p such that 4*p - 3 is also a prime.
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4
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2, 5, 11, 19, 23, 29, 59, 61, 71, 79, 89, 101, 103, 109, 113, 131, 149, 151, 191, 193, 233, 239, 263, 283, 313, 331, 353, 359, 373, 389, 401, 431, 439, 479, 499, 521, 523, 541, 569, 571, 599, 619, 631, 653, 659, 673, 683, 701, 709, 739, 743, 751, 761, 773, 829
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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q=3; lst={}; Do[p=Prime[n]; If[PrimeQ[(q+1)*p-q], AppendTo[lst, p]], {n, 6!}]; lst
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PROG
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(Magma) [n: n in [0..2000] | IsPrime(n) and IsPrime(4*n - 3)]; // Vincenzo Librandi, Feb 03 2014
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CROSSREFS
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Cf. A136082, A136083, A023213, A023221, A023235, A023240, A157974, A136083, A136084, A136085, A136086, A136087, A089440, A157975, A157976, A157977.
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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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