Primes of the form $a^2 + 5b^2$
34617
Number Theory: which primes are a sum of two squares?
76807
How come if $\ i\ $ not of the following form, then $12i + 5$ must be prime?
52530
There exists a prime congruent to $m$ mod $p$
91069
Express an even number as a sum of primes
2593
Proof for Mersenne primes?
43567
Some hints for "If a prime $p = n^2+5$, then $p\equiv 1\mod 10$ or $p\equiv 9\mod 10$"
35821
Infinitely many primes for quadratic residues
72666
Prime Numbers And Perfect Squares
131731
Primes that can't be written as sum of two squares. Mod
73095
Foundational proof for Mersenne primes
98468
Are there infinitely many primes of the form $n!+1$?
57275
On the primality of integers of the form $p^2+k$
5142
Infinitely many primes of the form $pn+1$
146725
Are numbers of the form $n^2+n+17$ always prime
42376
Let $p$ be prime and $(\frac{-3}p)=1$. Prove that $p$ is of the form $p=a^2+3b^2$
155452
Prime factorization of square numbers
34588
Number Theory: $p!+p=n^2$, $p$ = prime