989466010702279111

This number is a prime.

                                                         98946601 0702279111

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R19-19! is the largest positive number of form Rm-m! that is prime. It is the only such emirp and case where m, Rm, and Rm-m! are all primes. [Loungrides]

Submitted: 2012-04-03 13:47:21;   Last Modified: 2014-08-30 10:16:45.
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