Solve $660x\equiv 1$ mod $43$
30045
Solving linear congruences by hand: modular fractions and inverses
36713
Solving multiple congruences by CRT = Chinese Remainder Theorem
21530
How many solutions of $\mod 63$ : $x^2=1 \pmod7 $ and $x^3=1\pmod 9$
42754
Modular arithmetic: division, fractions, solving linear congruences
33735
The square of an integer is congruent to 0 or 1 mod 4
158684
How to solve and see resolution of $13^{53} \pmod 7$ using Fermat little Theorem?
110460
find remainder of a number
32803
Prove that if b is coprime to 6 then $b^2 \equiv 1 $ (mod 24)
4129
Solvability of $a \equiv x^2 \mod b$
15314
Number of solutions to $x^n \equiv 1 \mod p$
155012
Solving quadratic equations in modular arithmetic
95033
Find the remainder of a number with a large exponent
152299
Proving $a^{n-1} \equiv 1 \mod n $ when n is not prime.
102860
solve $3x^2 + 6x +1 \equiv 0 \pmod {19}$
51161
Finding the inverse of 84 mod 5
41673
Solve congruence system $\ x\equiv m_i-1 \pmod{m_i}\,$ for $\,i = 1,\ldots, k$
36611
Algorithms for solving the discrete logarithm $a^x \equiv b\pmod{n}$ when $\gcd(a,n) \neq 1$