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A unique pandigital number n (each of the ten digits occur exactly once) since n2+1, 2n+1 and n+1 are all emirps. The six resulting primes are 14372328707229601477, 77410692270782327341, 7582170853, 3580712857, 3791085427 and 7245801973. [De Geest]

 

  Submitted: 2003-12-20 16:14:24;   Last Modified: 2008-01-30 11:28:00.



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