How would I go about figuring out how many units are in Zeta 230?

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- May 28th 2010, 05:12 PMHeadOnAPikeUnits in a ring?
How would I go about figuring out how many units are in Zeta 230?

- May 28th 2010, 06:04 PMPurslow
by zeta 230, do you mean the ring of intergers modulo 230? if so, the units are the invertible elements, ie 1, 3, 77, 7 , 33 ......

- May 28th 2010, 06:42 PMDrexel28
- May 29th 2010, 02:05 AMHeadOnAPike
Yes, the ring of integers mod 230. How do I find out the number of units (inverses for the product) without actually going through them all?