n²-1=(n-1)(n+1)
If n²-1 is prime, then n-1=1, or n+1=1.
The only valid solution is when n=2 you might be looking for a very long time in your search for another one!
n²-1=(n-1)(n+1)
If n²-1 is prime, then n-1=1, or n+1=1.
The only valid solution is when n=2 you might be looking for a very long time in your search for another one!