Pi Day of the Century – 3-14-15

Since Saturday is Pi Day of the Century, I am starting the celebrations eaRoyal blue10rly by wearing my t-shirt today.  I got this as a gift from my better-half.  This fits my geeky and nerdy side to the T.   π Day was started by Larry Shaw of the  San Francisco Exploratorium in 1988.  This is Pi Day of the Century because of the sequential time that will occur on 3/14/15 at 9:26:53 following the sequence of pi.

From Wikipedia, a few Pi facts:

The number π is a mathematical constant, the ratio of a circle‘s circumference to its diameter, commonly approximated as 3.14159. It has been represented by the Greek letter “π” since the mid-18th century, though it is also sometimes spelled out as “pi” (/p/).

Being an irrational number, π cannot be expressed exactly as a common fraction, although fractions such as 22/7 and other rational numbers are commonly used to approximate π. Consequently its decimal representation never ends and never settles into a permanent repeating pattern. The digits appear to be randomly distributed; however, to date, no proof of this has been discovered. Also, π is a transcendental number – a number that is not the root of any non-zero polynomial having rational coefficients. This transcendence of π implies that it is impossible to solve the ancient challenge of squaring the circle with a compass and straightedge.

In August 2009, a Japanese Supercomputer called the T2K Open Supercomputer was claimed to have more than doubled the previous record by calculating π to 2.6 trillion digits in approximately 73 hours and 36 minutes.

In December 2009, Fabrice Bellard used a home computer to compute 2.7 trillion decimal digits of π. Calculations were performed in base 2 (binary), then the result was converted to base 10 (decimal). The calculation, conversion, and verification steps took a total of 131 days.[21]

In August 2010, Shigeru Kondo used Alexander Yee’s y-cruncher to calculate 5 trillion digits of π. This was the world record for any type of calculation, but significantly it was performed on a home computer built by Kondo.[22]The calculation was done between 4 May and 3 August, with the primary and secondary verifications taking 64 and 66 hours respectively.[23] In October 2011, they broke their own record by computing ten trillion (1013) and fifty digits using the same method but with better hardware. [24][25]

In December 2013 they broke their own record again when they computed 12.1 trillion digits of π.[26]