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The concatenated dates of the month without 30 is prime. Interesting that if you insert the number 30, you find that the new composite has a prime divisor of 29, the last date in a leap year! Proved prime by APRT-CLE. [Haga]

 

  Submitted: 2004-02-02 05:45:55;   Last Modified: 2008-01-30 11:28:00.



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