How to compute $3^{2003}\pmod {99}$ by hand?
360
Modular exponentiation by hand ($a^b\bmod c$)
124969
How do I calculate n modulo 3 in LaTeX?
22962
How to show $\binom{2p}{p} \equiv 2\pmod p$?
72406
Last two digits of $2^{1000}$ via Chinese Remainder Theorem?
12210
Show that $a^{61} \equiv a\pmod{1001}$ for every $a \in \mathbb{N}$
147665
$a_1=3;\ a_{n+1}=3^{a_n}$; find $a_{2004}\bmod100$
70492
What is the shortest way to compute the last 3 digits of $17^{256}$?
97303
Calculate the multiplicative inverse modulo a composite number
913
Evaluating $\sum_{n=0}^{\infty}{\sin^{3}\left(3^{n}\right) \over 3^{n}}$
156510
How to compute $2^{\text{some huge power}}$
18767
How do you find the modular inverse of $5\pmod{\!11}$
15897
Solve a congruence $1978^{20}\equiv x\pmod{125}$
139077
How to calculate $5^{3^{1000}}\bmod 101$?
138696
Last two and three digits of $7^{754}$
157766
Are primes (ignoring $2$) equally likely to be $1~\text{or}~3\pmod 4$?
109640
How do i find $(1+i)^{100}?$
147505
Calculate the last digit of $3^{347}$