Whose equation is this?
Answer
Srinivasa Ramanujan
Calculating pi has become the computer scientist equivalent of tuning muscle cars: we don’t actually need more digits for anything useful, because the basics do everything we actually need it for, but we’ve spent years stacking up air-cooled hardware just because. In 1985 it was calculated to 17 million digits. Srinivasa Ramanujan found the formula used. Around 1910.