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Primes of the form 10^n+-n

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  • Nathan Russell
    10^n+n is prime for n=1, 9, 69, 313 and 451. 10^n-n is prime for n=3, 23, 171, 903 and in both cases no other values likely to be found in a significant amount
    Message 1 of 1 , May 2, 2003
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      10^n+n is prime for n=1, 9, 69, 313 and 451.

      10^n-n is prime for n=3, 23, 171, 903 and in both cases no other values
      likely to be found in a significant amount of time (n checked through 8
      thousand). This may be already known, I have not checked.

      Nathan
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