March 14 is Pi Day, which gives you a hint to the start of the irrational number that is central to a lot of mathematics. In a video, Duke students competed to provide the longest string of Pi digits.

The first 100 digits of pi are 3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 ...

Approximations for the mathematical constant pi () in the history of mathematics ... correct to what corresponds to about seven decimal digits by the 5th century. Further progress was made only ...