I used to stay up nights in my teenage years doing math for fun and actually came up with two or three theorems by myself. What I found out was that all of my (

I used to stay up nights in my teenage years doing math for fun and actually came up with two or three theorems by myself. What I found out was that all of my (previously) unknown unknowns were are actually very well known within the math community (Wilson's theorem, Fermat's little theorem, trailing zeroes in a factorial, ...).