158,962,555,217,826,360,000 - Numberphile

[Paul F.]

I'm late to this thread, but I think I found part II..

https://www.youtube.com/watch?v=V4V2bpZlqx8&list=UUoxcjq-8xIDTYp3uz647V5A&index=1

Best, clearest, explanation I've ever seen on Enigma!
It helps when the person doing the explaining actually DOES know the math! (I most definitely DON'T... which is where his clarity is appreciated!).