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The emirp ZIP Code of San Francisco, CA. It consists of digits that are perfect squares and the sum of whose digits is a perfect square. This emirp is also the concatenation of two primes, one of which is an emirp and the other is a repunit prime. [Green]

 

  Submitted: 2013-02-10 17:25:53;   Last Modified: 2013-02-10 19:42:22.



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