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A299159
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Numbers k such that 4*k-1, 6*k-1 and 12*k-1 are prime.
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2
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1, 2, 5, 15, 32, 42, 60, 110, 120, 152, 215, 242, 260, 315, 357, 390, 392, 425, 470, 495, 560, 732, 735, 840, 1055, 1082, 1127, 1275, 1307, 1352, 1457, 1562, 1590, 1755, 1782, 1797, 1887, 1925, 1967, 2055, 2112, 2132, 2150, 2175, 2205, 2360, 2387, 2472, 2517, 2567, 2667, 2717, 2822, 2882, 2930, 2945
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OFFSET
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1,2
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LINKS
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MAPLE
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select(j -> isprime(4*j-1) and isprime(6*j-1) and isprime(12*j-1), [$1..10000]);
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MATHEMATICA
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Select[Range[3000], And@@PrimeQ/@({4, 6, 12} # - 1) &] (* Vincenzo Librandi, Feb 04 2018 *)
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PROG
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(Magma) [n: n in [0..3000] |IsPrime(4*n-1) and IsPrime(6*n-1) and IsPrime(12*n-1)]; // Vincenzo Librandi, Feb 04 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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