Today is Pi Day. It also happens to be birthday of Albert Einstein and death anniversary of Stephen Hawking.

Pi Day celebrates the mathematical constant π (3.14). It is celebrated in countries that follow the month/day (m/dd) date format, because the digits in the date, March 14 or 3/14, are the first three digits of π (3.14). The Day was founded by Physicist Larry Shaw in 1988.

We all know that Pi is an irrational number – which means that it has infinite digits and it never ends. Mathematical Nerds have dabbled in memoizing and reciting hundreds of digits of Pi. B

It is said that NASA uses 15 digits of Pi for its calculations related to the Space programmes. 20 Digits are more than enough to do any kind of calculations involving Pi with high precision/accuracy. But have you wondered how many digits of Pi do we know?

Guess! Make a wild guess!

10,000? A million? A billion?

Well, I found this amusing fact in today’s Mint newspaper.

We now know 63 Trillion digits of Pi! That’s a mammoth achievement of computing power!