Elena Lucrezia Cornaro Piscopia

I was always good at math, but didn't really care about it until discovering my special interest as that is one of his areas of expertise (said special interest is Daniel Tammet, if you were wondering).

I also noticed that this was posted on Pi Day (3/14), which is when math geeks have an excuse to get all excited about the number Pi. I only know up to 3.141592659, but my special interest first came into the public eye for reciting over 22,500 digits back in 2004.