New posts in Elementary Number Theory

To find all integers n such that the given expression is a perfect square

Sum of floors inequality

find the remainder for $\color{purple}{TETRATION}$ such that $( {^{2021}2021}(\mod13))$

Gap between composite numbers that aren't divisible by 2,3 or 5

A polynomial divisible by primes of special form

Number Theory - Differences of powers of 2

Given $f(i, j) = f(i − 1, j − 1) + f(i, j − 1)$, find the value of $f(1009, 2019)$

If $m,n\in N$ Prove that there is such a positive integer k, such that $(\sqrt{m}+\sqrt{m+1})^n=\sqrt{k}+\sqrt{k+1}$

Convergence of infinite products flaw in this derivation of Euler product formula?

Calculating the number of integers divisible by 8