# Practical use of the phi function

1. Jun 30, 2010

### cap.r

I am not sure if this is the right section but I thought you physicists may be able to give me an example.

I am demonstrating the usefulness of the phi function and finding the last two digits of $$107^{999999999}$$

I am just wonder where in physics or astronomy such a massive number would come in handy. I think the audience would benefit from a practical example but I am not sure if something so big is relevant.

this number has $$999999999log(107)+1$$ digits so it's very very big...