#1**0 **

*How many prime numbers p exist such that p 2 + 2 is also a prime number?*

Before I go to the trouble of trying to find an answer, I need to know does p 2 + 2 mean p^{2} + 2 ?

The first thing you can do is eliminate all even numbers because no even number is prime, except 2.

Guest Jul 13, 2020

edited by
Guest
Jul 13, 2020