For any number $n$, if a prime $p$ is a primitive root modulo $n$, then is $p$ also a primitive root modulo $d$ where $d|n$ ?
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What is a primitve root? What are your thoughts? – miracle173 Jan 23 '17 at 02:24
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Related : http://math.stackexchange.com/questions/170648/prove-that-any-primitive-root-r-of-pn-is-also-a-primitive-root-of-p – lab bhattacharjee Jan 23 '17 at 02:26