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With p = 2327138083, all 12 possible concatenations of the digits in two or all three of the primes (3, 7, p) is prime: 37, 73, p3, p7, 3p, 7p, p37, p73, 3p7, 37p, 7p3, 73p. 3 is part of any such triple. 7 is the smallest possible second prime. p is the smallest third prime which works with 3 and 7. [Andersen]


  Submitted: 2009-09-10 06:19:53;   Last Modified: 2009-09-10 20:47:40.

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