Prove that if then is prime, where . is the Euler's totient function. I am able to show that is square-free under the above condition.
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Originally Posted by abhishekkgp Prove that if then is prime, where . is the Euler's totient function. I am able to show that is square-free under the above condition. Lehmer's conjecture
Originally Posted by princeps Lehmer's conjecture Thank You. I did not know its an unsolved problem or I would not post it.
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