Every number in $\mathbb{F}_p$ can be written as a sum of two squares?
67332
Sum of two squares modulo p
29251
Show that the square of any prime number is the Factof of some integer
94019
Find all $p$'s such that $p^4 + p^3 + p^2 + p +1$ is a perfect square.
127816
Number theory proof mod p
24301
Can a finite sum of square roots be an integer?
44033
Number theory lemma - $x^2 \equiv 1 \pmod p$ implies $x\equiv\pm 1\pmod p$
8494
Proof Check: Number of elements of $\mathbb{F}_{p^{n}}$ of the form $a^{p}-a$ for some $a \in \mathbb{F}_{p^{n}}$.
130731
Is every integer the sum of distinct prime numbers?
135458
When is a sum of consecutive squares equal to a square?
11620
Is it true that any matrix in $M_2(\mathbb R)$ is the sum of two squares?
110195
$p=4n+3$ never has a Decomposition into $2$ Squares, right?
81124
Infinite product problem: $\sum p_n0$
142584
Confusion in proof that primes $p = 4k + 1$ are uniquely the sums of two squares
146241
If $a \in \Bbb Z$ is the sum of two squares then $a$ can't be written in which of the following forms?
127566
$2AB$ is a perfect square and $A+B$ is not a perfect square
152754
When is the sum of divisors a perfect square?
125702
There is a square $Q$ consisting of $(0,0), (2,0), (0,2), (2,2)$