How to calculate $5^{2003}$ mod $13$
360
Modular exponentiation by hand ($a^b\bmod c$)
36031
Finding modular of a fraction
49649
How can I find out whether a number is a quadratic residue in a large modulo?
69858
Congruence Equation $3n^3+12n^2+13n+2\equiv0,\pmod{2\times3\times5}$
131241
primes congruent to 5 mod 6 and 1 mod p
25299
What is the remainder when $2^{1990}$ is divided by $1990$?
17609
Finding the remainder of $11^{2013}$ divided by $61$
58803
${n \choose k} \bmod m$ using Chinese remainder theorem?
49116
Finding the last digit of $103^{103^{103^{103^{103}}}}$
29298
How to calculate modulus of large numbers?
29204
$a\equiv\bar a\!\pmod{\!kn}\Rightarrow a\equiv\bar a\!\pmod{\! n};\ $ $(a\bmod kn)\bmod n=a\bmod n.\ $ Congruences persist mod factors of the modulus
51161
Finding the inverse of 84 mod 5
66861
Show that $11^{10} \equiv 1 (\mod 100)$
1895
How to show that $2730\mid n^{13}-n\;\;\forall n\in\mathbb{N}$
156510
How to compute $2^{\text{some huge power}}$
72406
Last two digits of $2^{1000}$ via Chinese Remainder Theorem?
114346
Why is $a^{-1}$ mod $p$ equal to $a^{p-2}$ mod $p$?