N-squared plus 1 conjecture

The n-squared plus 1 conjecture is a famous conjecture in Number theory. It is one of the four great unsolved conjectures in Number Theory collectively known as Landau's Problems.

Statement

There are infinitely many primes in the form $n^2+1$, where $n$ is a positive integer.

See also

This article is a stub. Help us out by expanding it.