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A034811
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Concatenation of 'nextprime(n) and n and prevprime(n)' is a prime.
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1
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8, 23, 32, 36, 44, 54, 66, 74, 77, 84, 91, 104, 113, 115, 122, 130, 132, 162, 174, 178, 187, 188, 191, 204, 212, 222, 224, 232, 235, 259, 267, 281, 286, 295, 302, 305, 317, 325, 344, 353, 367, 368, 384, 389, 391, 401, 406, 427, 430, 433, 457, 458, 461, 464
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OFFSET
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0,1
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LINKS
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EXAMPLE
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n=353 -> next prime is 359, previous prime is 349, thus '359353349' is a prime.
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MATHEMATICA
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Select[Range[500], PrimeQ[FromDigits[Flatten[IntegerDigits/@ { NextPrime[#], #, NextPrime[ #, -1]}]]]&] (* Harvey P. Dale, Jan 12 2016 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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