97

This number is a prime.

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The smallest number n, (it is also prime and emirp), such that the product of first n positive even numbers minus 1 is a prime greater than a googol. Note that the product of first n even numbers minus 1 is given by the form 2^n*n!-1, where n is the number of even numbers. May we call the primes of this form, “almost evenian primes”? [Loungrides]

Submitted: 2018-02-10 02:23:14;   Last Modified: 2018-02-10 06:43:49.
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