Pi Computation RecordBy Fabrice Bellard On December 31st, 2009, about 2700 billion decimal digits of Pi were computed using a single desktop computer. It was the World Record for the computation of Pi until the record of 5 trillion digits of Alexander J. Yee & Shigeru Kondo on August 2, 2010. Press Release Frequently Asked Questions Technical Notes (4th revision, PDF format) The Digits and Statistics Software Download
円周率の公式と計算法(PDF)
