The most decimal places to which pi (p) has been calculated is 206,158,430,000.
Professor Yasumasa Kanada of the University of Tokyo and Dr Daisuke Takahashi made the calculation by running two different programs in 1999.
The number pi (twenty two divided by seven) is one of the most important numbers in math. Whenever circles are involved in any calculation, pi is a critical number. Pi is what mathematicians call an irrational number – it has an infinite number of digits after its decimal point, which follow no repeating pattern.
Because of this lack of a pattern, many people have become fascinated by calculating pi to more and more accurate values. The latest value, by Yasumasa Kanada is 3.141… followed by 206,158,430,000 more digits!
The fact that pi is a constant has been known since prehistory. In the Bible, it is stated approximately as being equal to 3. Pi is always equal to half the circumference of a circle, divided by its radius.
The main program used by the mathematicians ran for 37 hr. 21 min.
Today's fact was adapted from: Guinness World Records.