Does $1+x+x^2 ... x^{p -1}$ being a prime number imply p is prime?
136310
Prime number in a polynomial expression
138259
Proof or disproof that every integer can be written as the sum of a prime and a square.
87596
Is $\sum_{p}\frac{1}{p^{2}}$ irrational?
49372
$x+1/x$ an integer implies $x^n+1/x^n$ an integer
34617
Number Theory: which primes are a sum of two squares?
54547
Prove this number must be a prime number or 1.
22742
Prove that if $p$ and $p^2+2$ are prime then $p^3+2$ is prime too
58114
For which primes p is $p^2 + 2$ also prime?
50663
prove or disprove: For a prime number p, there is a positive integer n such that $p+1 $= $n^2$ if and only if $ p = 3.$
45700
How can I know if $2^{2^{2^{2^{2}}}}+1=?$ is prime?
123296
Determine whether a number is prime
85042
Write $1/1 + 1/2 + ...1/ (p-1)=a/b$ with $(a,b)=1$. Show that $p^2 \mid a$ if $p\geq 5$ is prime [Wolstenholme's theorem]
13904
$p = x^2 + xy + y^2$ if and only if $p \equiv 1 \text{ mod }3$?
126945
checking if a number is a prime
48691
Product of all prime numbers upto some prime $p$
75528
$x^2-x+1$ has a root $\!\bmod p\,$ for infinitely many primes $p$
50596
$p_1p_2...p_n +1$ is not square for $p_k = k$'th prime