Which is the least odd prime $p=n^6+1$ for some $n\in\mathbb N$? I have tested for $n\leq 10,000$ without finding any.
Due to a conjecture of Bunyakovsky there are an infinite number of such primes, since $X^6+1$ is irreducible over $\mathbb Z$.
Which is the least odd prime $p=n^6+1$ for some $n\in\mathbb N$? I have tested for $n\leq 10,000$ without finding any.
Due to a conjecture of Bunyakovsky there are an infinite number of such primes, since $X^6+1$ is irreducible over $\mathbb Z$.
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If $n>1$ $$n^6+1 = \underbrace{(n^2+1)}_{>1}\underbrace{(n^4-n^2+1)}_{>1}$$ then $p$ is not a prime.