Question 65
How many prime numbers can be expressed as $n^{n+1}+1$, where $n$ is a positive integer?
(A) 0; (B) 1; (C) 2; (D) More than 2 but finitely many; (E) Infinitely many.
(A) 0; (B) 1; (C) 2; (D) More than 2 but finitely many; (E) Infinitely many.