While by no means a prng expert, I can point you to a few places you might find interesting:
If you want to learn about rng, I would point here first. Really impressive libre
true random number generator. Impressive at least to someone like me who knows little about it. One day I plan to really disect this project; I just have so much to learn.
Something more of a reference to rng-related topics rather than a learning resource. Still though, you may find it interesting.
A wikipedia page on what I know is one method of generating pseudo random numbers.
Sorry I don't know more about rng, I find it a really really interesting topic despite not knowing a lot about it. Please update the thread with other resources / sites you find!