199

This number is a prime.

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1000^199-999^199 is the only non titanic prime of the form p=1000^x-999^x. Note that the component 199 is equal to the smallest emirp of the form q=100^x-99^x. [Loungrides]

Submitted: 2009-12-15 18:58:41; Last Modified: 2009-12-16 02:26:08.