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1000273817 is the smallest ten-digit prime that produces five other primes by changing only its first digit. I.e., 3000273817, 4000273817, 6000273817, 7000273817, and 9000273817 are primes. [Opao]

 

  Submitted: 2004-01-01 07:07:47;   Last Modified: 2008-01-30 11:28:00.



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