Primes of the form n^2 - 1?

[Jon Awbrey]

o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o

Alonso Del Arte wrote:
> 
> There are plenty of primes of the form n^2 + 1 (even if it's not known
> whether they're infinite) but are there any primes of the form n^2 - 1
> besides 3?
> 
> Is there some well-known theorem or conjecture on the subject I have overlooked?
> 
> Alonso


(n^2 - 1) = (n+1)(n-1)

ja

o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o
inquiry e-lab: http://stderr.org/pipermail/inquiry/
o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o