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233: (233, 239, 241, 251, 257) is the only case of five consecutive 3-digit primes p < q < r < s < t, such that p divides q*r*s*t+1. Note that the sequence of primes 2, 3, 5, 7, 11 is the previous case with the same property. [Loungrides]

 

  Submitted: 2015-08-02 02:05:37;   Last Modified: 2016-05-24 08:00:40.



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