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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- March 6th 2012, 04:55 AMabhishekkgpphi(n) divides n-1 implies n is prime
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. - March 6th 2012, 05:40 AMprincepsRe: phi(n) divides n-1 implies n is prime
- March 6th 2012, 06:09 AMabhishekkgpRe: phi(n) divides n-1 implies n is prime