## A Fact

For discussing Olympiad Level Number Theory problems
mutasimmim
Posts: 107
Joined: Sun Dec 12, 2010 10:46 am

### A Fact

Prove that $2$ is a primitive root of $5^n$ for all positive integers $n$.

SANZEED
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Joined: Wed Dec 28, 2011 6:45 pm
$\color{blue}{\textit{To}} \color{red}{\textit{ problems }} \color{blue}{\textit{I am encountering with-}} \color{green}{\textit{AVADA KEDAVRA!}}$