Find all integers n, so that $n^2$ divide $2^n+1$
12967
Find all $n>1$ such that $\dfrac{2^n+1}{n^2}$ is an integer.
85731
Prove by induction that $n! > n^2$
8504
Factoring $x^n + y^n$ over the integers
152638
The set of integers $n$ expressible as $n=x^2+xy+y^2$
112631
Prove that if $d$ divides $n$, then $2^d -1$ divides $2^n -1$
104920
Can we find positive integers $a$ and $k \geq 2$ with $2^n - 1 = a^k$?
115244
Integer solutions of $m^2+(m+1)^2=n^4+(n+1)^4$
98443
Find positive integers such that $2n^3 + 5|n^4 +n+1$
106030
Find all the positive integer
70386
Proof by induction: $2^n > n^2$ for all integer $n$ greater than $4$
19254
How many rationals of the form $\large \frac{2^n+1}{n^2}$ are integers?
112147
Proving $9$ divides $n^3 + (n+1)^3 + (n+2)^3$
68328
Infinitely many $n$ such that $2^n-n$ is divisible by a prime
153313
Prove that for all integers $ a $ and $ b $, if $ a $ divides $ b $, then $ a^{2} $ divides $ b^{2} $.
24053
How can I prove that $n^7 - n$ is divisible by $42$ for any integer $n$?
77076
Proof that $(x-1)^2$ divides a $nx^{n+1} – (n+1)x^{n}+1$
69136
factorization of a^n+1?