How would I go about finding a number that is a primitive root modulo 125?(adsbygoogle = window.adsbygoogle || []).push({});

There definitely exists a primitive root since 5^3 =125

The problem basically comes down to finding 'a' (primitive root);

a^50 congruent to -1 (mod 125)

Anyone know a way apart from trial and error?

Thanks

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# Homework Help: Primitive roots?

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