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A138695
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Primes p such that 24*p-1, 24*p+1 and 30*p-1, 30*p+1 are twin primes.
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1
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43, 113, 9283, 13147, 14057, 17977, 26893, 34273, 47123, 47543, 56477, 60887, 75557, 123803, 137873, 153623, 163337, 201797, 250307, 284747, 325697, 333787, 349637, 356287, 358597, 447217, 455687, 538943, 561553, 563263, 582317, 616757
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OFFSET
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1,1
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LINKS
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EXAMPLE
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24*43-1=1031, 24*43+1=1033; 30*43-1=1289, 30*43+1=1291.
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MATHEMATICA
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a=24; b=30; Select[Prime[Range[14^4]], PrimeQ[a*#-1]&&PrimeQ[a*#+1]&&PrimeQ[b*#-1]&&PrimeQ[b*#+1]&]
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PROG
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(Magma) [p: p in PrimesUpTo(1000)| IsPrime(24*p-1) and IsPrime(24*p+1) and IsPrime(30*p-1) and IsPrime(30*p+1)]; // Vincenzo Librandi, Nov 24 2010
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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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