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The only prime p of the form p = a^b*c^d+1, where a, b, c, d are the prime digits, i.e., 2^7*5^3+1 = 16001. Note that it is a bemirp, i.e., an invertible emirp whose the reversal is also emirp. [Loungrides]


  Submitted: 2013-02-09 00:21:52;   Last Modified: 2016-05-02 08:46:35.

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