Here is my solution for this weeks challenge.
Why do you think its slow? So my solution just ran 10000 Simulations in 1:11 (as I configured mine in the way that I just have to enter how many simulations I want to run), haveing an i7 with 16gb ram, so I did not feel that was slow. The recommended 1000 it runs in 8 seconds.
By the way, I gotta say, the more simulations you run, the nicer the curve looks like, so 10000 already gives me a very nice shaped curve with almost no breakouts in between.