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                                               1717171 7171717171 7171717171
7171717131 3131313131 3131313131 3131111111 1111111111 1111177777 7755555333
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The concatenation of 17 17's followed by 13 13's followed by 11 11's followed by 7 7's followed by 5 5's followed by 3 3's is a prime of prime length and prime digital sum. [Patterson]

 

  Submitted: 2004-01-02 08:19:19;   Last Modified: 2008-01-30 11:28:00.



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