How to get exponent?

Hello!

To retrieve darkorbit packets though a proxy, i need to find the exponent(n) from this equation:

c = b^n mod m;

I have c, b and m. The only unknown is n.
b and m are primes.

Any ideas?

calculate factorial...

1, 10, 100, 1000, 10000, 100000, 1000000, ... years

don't really sure what you mean by "mod". if it's module, then it can be found.

b^n=\frac{c}{\mod m}

and as you know b,c,m, that can be calculated. give a random example for them and I'll try to help.

What do you mean with frac? Yes, its a module.