Are there any resources for questions on primitive roots?

[matqkks]

Main Question or Discussion Point

Does anyone know of any resources on questions on primitive roots and order of a modulo n? They need to be suitable for elementary number theory course. (These could be interesting results and challenging ones).

 

[jedishrfu]

Perhaps @fresh_42 can suggest some examples.

 

[fresh_42]

I think I already did in a previous thread: encryptions, error correcting codes, DFFT, prime tests, or any basic algebra textbook. I don't remember details or a certain book, other than standard materials. The question is also very unspecific.