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A023235
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Primes p such that 9*p + 8 is also prime.
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20
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5, 7, 11, 19, 29, 47, 61, 71, 79, 89, 97, 107, 127, 131, 139, 151, 167, 179, 181, 211, 229, 251, 271, 317, 337, 397, 401, 419, 421, 449, 461, 467, 487, 541, 547, 557, 571, 599, 601, 607, 659, 677, 701, 709, 727, 739, 761, 811, 827, 839, 877, 881, 907, 929, 971, 1051
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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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PROG
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(Magma) [n: n in [0..1000] | IsPrime(n) and IsPrime(9*n+8)]; // Vincenzo Librandi, Nov 20 2010
(Magma) [p: p in PrimesUpTo(1100)| IsPrime(9*p+8)]; // Vincenzo Librandi, May 21 2014
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CROSSREFS
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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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