This number is a prime.
Single Curio View: (Seek other curios for this number)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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