New posts in Integers

Matrix with even integers entries doesn't have odd eigenvalue

Is $\Bbb{Z}$ compact under the evenly spaced integer topology?

Polynomial that indicates whether or not $x = 1 \pmod n$.

$x \cdot y$ is an integer and $x - y$ is an integer. Do $x$ and $y$ both have to be integers?

Phi Function Summation and Divisors

Every sufficiently large positive integer is the average of $n$ distinct primes for certain $n \geq 2$?

In $(\mathbb{Z},<)$ is it possible to define the operation of addition?

Quadruples of integers $(a,b,c,d)$ such that for any two distinct elements, $n,m$, $nm+1$ is a square

Finding all the integer solutions

Show that $3^{7^n}+5^{7^n}\equiv 1 \pmod{7^{n+1}}$