The annual celebration of Pi Day is observed on March 14th. Pi Day is observed on March 14 since 3, 1, and 4 are the first three significant digits of π. Pi history goes back to Babylonian ages. One Old Babylonian mathematical tablet excavated near Susa in 1936 (dated to between the 19th and 17th centuries BCE) gives a better approximation of π as 25/8=3.125. From those early days until Indian mathematician Srinivasa Ramanujan found converging infinite series, the Pi was calculated manually.
In 1910, the Indian mathematician Srinivasa Ramanujan found several rapidly converging infinite series of π. It computes a further eight decimal places of π with each term in the series. His series are now the basis for the fastest algorithms currently used to calculate π. From the mid-20th century onwards, all calculations of π have been done with the help of calculators or computers.
Below we have summarized the journey of computational Pi.
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