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- #1

- Feb 14, 2012

- 3,936

I've got an equation stating

*.*

**p=a(r-1)**If

*represents prime number and*

**p***is a positive integer, and*

**r***is a constant, what can we conclude for the constant*

**a***a*?

Like a $\in${-1, 1, -p, p}?

I suspect this has something to do with modular arithmetic...

Thanks.