Famous Problem of Euler
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How to prove that if a prime divides a Fermat Number then $p=k\cdot 2^{n+2}+1$?
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Number theory: Problem involving rational numbers
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Euler's $\phi(n)$ function and solutions of $\phi(n) = 4294967296=2^{32}$
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Fermat's little theorem proof by Euler
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Two problems on number theory
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Euler's theorem: [3]^2014^2014 mod 98
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An Olympiad problem in prime numbers :can we proof that "n" is prime in this case "
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Why is the formula for calculating euler totient true?
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Prove that if $d$ divides $n$ then $φ(d)$ divide $φ(n)$ for $φ$ denotes Euler’s φ-function.
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Generalizing values which Euler's-totient function does not take
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A high school Olympiad problem
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What is a mathematical solution to this problem? (Project Euler #106)
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The Frobenius Coin Problem
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The new introduced EulerMatrix problem
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Mathematica Improved Euler's Method
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Why is Euler's Totient function always even?
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Proof of a formula involving Euler's totient function: $\varphi (mn) = \varphi (m) \varphi (n) \cdot \frac{d}{\varphi (d)}$