A quick way to find $n$ such that $(n \times p) \mod q = 0$
21241
Proving $\,a\mid bc\!\iff\! \frac{a}{(a,b)}\!\mid c\ $ [general Euclid's Lemma]
77799
Determine the set of units $(\Bbb Z/n\Bbb Z)^\times$ for different values of $n$
57654
Congruent Modulo $n$: definition
87267
Conjecture similar to Fermat's Theorem.
67772
How to find $k$ such that $(\mathbb{Z} \times \mathbb{Z})/ \langle (m,n)\rangle \cong \mathbb{Z} \times \mathbb{Z}_k$
9118
Polynomial division: an obvious trick? [reducing mod $\textit{simpler}$ multiples]
125702
There is a square $Q$ consisting of $(0,0), (2,0), (0,2), (2,2)$
15314
Number of solutions to $x^n \equiv 1 \mod p$
73238
Show that $a^{q-1} \equiv 1 \pmod{pq}$
33735
The square of an integer is congruent to 0 or 1 mod 4
71788
Prove existence of multiplicative inverse modulo p when p is prime
70861
$\mathbb P^n\times \mathbb P^m\not\cong \mathbb P^{m+n}$
82262
minimal polynomial of nth root of 2 over $\mathbb Q$
66785
Find $\gcd(p^n-1,p^m+1)$.
84491
Finding the smallest positive integer $n$ such that $S_n$ contains an element of order 60.
58803
${n \choose k} \bmod m$ using Chinese remainder theorem?
14827
RSA: Fast factorization of N if d and e are known