pi !

pi is a mathematical constant whose value is the ratio of any circle's circumference to its diameter in Euclidean space; this is the same value as the ratio of a circle's area to the square of its radius. pi is an irrational number, which means that its value cannot be expressed exactly as a fraction m/n, where m and n are integers. Consequently, its decimal representation never ends or repeats. It is also a transcendental number, which implies, among other things, that no finite sequence of algebraic operations on integers (powers, roots, sums, etc.) can be equal to its value. The current record for the number of computed digits of pi is more than 2.5 trillion (10^12) digits. Completed on Aug 24, 2009, in Japan by the University of Tsukuba, it took the supercomputer system T2K Tsukuba almost 74 hours to calculate the 2‚576‚980‚370‚000 digits of pi. I would paste the record number of pi here but it would take up over 2.5 terabytes of space (assuming each number is 1 byte) and I don't think Urban dictionary would appreciate that.