Question involving discriminant of quadratic congruence in elementary number theory.
8784
modulo version of the quadratic formula and Euler's criterion
52530
There exists a prime congruent to $m$ mod $p$
75318
How do you prove that a prime is the sum of two squares iff it is congruent to 1 mod 4?
155012
Solving quadratic equations in modular arithmetic
112390
Solutions of $x^2 \equiv 1 \pmod N$
127945
Number of solutions to the congruence $x^q \equiv 1 \mod p$.
60305
Proving the congruence $p^{q-1}+q^{p-1} \equiv 1 \pmod{pq}$
58182
How to prove that $\mathbb{Q}[\sqrt{p_1}, \sqrt{p_2}, \ldots,\sqrt{p_n} ] = \mathbb{Q}[\sqrt{p_1}+ \sqrt{p_2}+\cdots + \sqrt{p_n}]$, for $p_i$ prime?
1713
number theory $\gcd(a,bc)=\gcd(a,c)$
99502
Question on the coefficients of $(1+x+x^2+x^3+x^4)^{496}$
14783
A Number Theory problem (GCD)
132931
Determining the parity of the coefficients of a quadratic given that there is a rational solution
96095
If $\{a_1,\dots,a_{\phi(n)}\}$ is a reduced residue system, what is $a_1\cdots a_{\phi(n)}$ congruent to?
33735
The square of an integer is congruent to 0 or 1 mod 4
97196
$k^{\phi(l)} + l^{\phi(k)} \equiv1\pmod{lk}\,$ if $\,\gcd(l,k)=1$
50249
Pairs of numbers with a given LCM
127901
If $x^2+y^2 \equiv 0\pmod{p}$, then $p \equiv 1 \pmod{4}$