Modular Arithmetic with higher powers
360
Modular exponentiation by hand ($a^b\bmod c$)
112390
Solutions of $x^2 \equiv 1 \pmod N$
99815
Dividing versus multiplying by inverse in modular arithmetic
82808
Do there exist any odd prime powers that can be represented as $n^4+4^n$?
91565
How to efficiently compute $\,25^{37}\pmod{55}$?
42754
Modular arithmetic: division, fractions, solving linear congruences
18767
How do you find the modular inverse of $5\pmod{\!11}$
19164
On the GCD of a Pair of Fermat Numbers
34192
Solve $x^{5} \equiv 2$ mod $221\ $ [Taking modular $k$'th roots if unique]
71788
Prove existence of multiplicative inverse modulo p when p is prime
131731
Primes that can't be written as sum of two squares. Mod
22029
Solving modular arithmetic questions
2904
Solving linear congruence (modular inverse or fraction) via gcd Bezout equation
21108
Perfect squares and modularly congruency in mod 5
1948
How do you raise a Java BigInteger to the power of a BigInteger without doing modular arithmetic?
96326
Number of $q$-th residues modulo $n$
107866
How is information disclosed by modular multiplication?