If p is prime , then p could be 2.
p² + 4 could also be prime? p = 2
2² + 4 = 4 + 4 = 8, 8 is not prime.
Therefore p = 2 is a counter example. In the sense that p = 2, does not support the statement that p² + 4 which is 8 in this case is a prime.
So p = 2 is a counter example.
