Is $2^k = 2013...$ for some $k$?
45240
Starting digits of $2^n$.
27859
least common multiple of $\{1,2,...,n\}$ is bigger than $2^{n-1}$
94983
Can an odd number $n$ divide $2^n-1$?
115514
Is the product $\prod_{k=1}^\infty \frac{2^k-1}{2^k}$ necessarily $0$?
13083
If for a polynomial $P(k) = 2^k$ for $k = 0, 1, . . . , n$, what is $P(n+1)$?
132351
Is the infinite sum of $2 ^{-n}$ convergent? Why?
118436
Identifying the series $\sum\limits_{k=-\infty}^{\infty} 2^k x^{2^k}$
102524
$ 1^k+2^k+3^k+...+(p-1)^k $ always a multiple of $p$?
106456
Identify $P(2014)$ if $P(i)=1/i$ for every positive integer $1\le i\le2013$
15793
Is the formula $(\text{ker }A)^\perp=\text{im }A^T$ necessarily true?
45101
Convergence of Power Series with $z^{2^k}$
44161
Using induction to prove $\sum_{k=0}^{N-1} 2^k = 2^N-1$
87813
How to show that for all k, $k! \ge (k/2)^{k/2}$
34427
last $2$ digit and last $3$ digit in $\displaystyle 2011^{{2012}^{2013}}$
19260
What does the notation $q^k || n$ mean?
109532
Proving $5^n \equiv 1 \pmod {2^r}$ when $n=2^{r-2}$
7894
Does it follow that $(n!)^n$ divide $(n^2)!$