Last digit in base $10$ for $3^{22}$?
4972
Mod of numbers with large exponents [modular order reduction]
3864
How to find length of digits in an integer?
101827
What would base $1$ be?
1895
How to show that $2730\mid n^{13}-n\;\;\forall n\in\mathbb{N}$
34427
last $2$ digit and last $3$ digit in $\displaystyle 2011^{{2012}^{2013}}$
26317
How is moving the last digit of a number to the front and multiplying related to multiplicative orders?
49174
how do I average the lowest 3 of the final 6 numbers in a row of 22? Some cells may be blank
147505
Calculate the last digit of $3^{347}$
142151
Find the last two digits of $9^{{9}^{9}}$
54441
Last two digits of $3^{400}$
70492
What is the shortest way to compute the last 3 digits of $17^{256}$?
22288
Repeated division - Converting from base 10 to another base
148535
Finding the "triangular root" of a number.
7473
How am I supposed to tell if a number is divisible by $13$ (I need a shortcut)?
155051
Writing $\left(\mathbf Z/2\oplus\mathbf Z/4\oplus\mathbf Z/8\right)\oplus\left(\mathbf Z/9\oplus\mathbf Z/27\right)$ in a different way
27249
How many digits does $2^{1000}$ contain?
137780
Change the base of the numeration