Pi Directory

David H. Bailey
Update: 07 March 2014

Press articles on pi, most recent listed first:

  1. [no author], "Just in time for pi day," Newswise, 4 Mar 2014, available at Online article.
  2. David H. Bailey and Jonathan M. Borwein, "Are the digits of pi random?," Huffington Post, 16 Apr 2013, available at Online article.
  3. Linda Vu, "Supercomputers crack sixty-trillionth binary digit of Pi-Squared," Dept. of Energy, 28 Apr 2011, available at Online article.
  4. Elizabeth Landau, "On pi day, one number 'reeks of mystery'," CNN, 12 Mar 2010, available at Online article.
  5. Erica Klarreich, "Springfield theory: mathematical references abound on The Simpsons," Science News, 10 Jun 2006, available at Online article.
    See also item #4 below for the fax mentioned in this article.
  6. Ivars Peterson, "Quilting pi," Science News, 6 May 2006, available at Online article.
  7. John Markoff, "14,159,265 new slices of rich technology," New York Times, 19 Aug 2005, available at Online article.
  8. June Kronholz, "If pious revelry gets you down, calculate the joys of pi day, Wall Street Journal, 15 Mar 2005, available at Online article.
  9. Erica Klarreich, "Math Lab: Computer experiments are transforming mathematics," Science News, vol. 165, 24 Apr 2004, available at Online article
  10. W. Wayt Gibbs, "A digital slice of pi: A new way to do pure math: Experimentally, Scientific American, May 2003, pg. 23, available at Online article
  11. Ivars Peterson, "Pi a la mode," Science News, 1 Sep 2001, available at Online article.
  12. Charles Seife, "Randomly distributed slices of pi," Science, vol. 293, 3 Aug 2001, pg. 793, availabe at Online article.
  13. Ivars Peterson, "Pick a digit, any digit," Science News Online, 28 Feb 1998, available at Online article.

Other general-interest items related to pi:

  1. Online pi search tool (see if your name or a hexadecimal string occurs in the first four billion binary digits of pi): http://pi.nersc.gov
  2. David Anderson's decimal pi search facility: http://www.angio.net/pi/piquery
  3. Fax to Bailey from "The Simpsons" TV show requesting digits of pi: PDF.
    Note: The 40,000th digit of pi was provided to the show by Bailey. The resulting TV script was aired in the show on May 6, 1993. Search for "Marge in Chains" on the page HTML.
  4. Alexander Yee's pi site (describes his computer program for computing pi to 10 trillion digits): http://www.numberworld.org/y-cruncher
  5. Fortran-90 and C programs implementing the BBP pi algorithm: BBP computer codes.
  6. The University of Newcastle/CARMA "Walking on Numbers" site (includes information on pi): http://carma.newcastle.edu.au/walks
  7. LBNL "wonder" website: Online article

Technical papers on pi, most recent listed first:

  1. David H. Bailey and Jonathan M. Borwein, "Pi day is upon us again, and we still do not know if pi is normal," American Mathematical Monthly, March 2014, pg. 191-206. PDF.
  2. David H. Bailey, Jonathan M. Borwein, Cristian S. Calude, Michael J. Dinneen, Monica Dumitrescu and Alex Yee, "An empirical approach to the normality of pi," Experimental Mathematics, vol. 21 (2012), pg. 375-384. PDF.
  3. David H. Bailey, Jonathan M. Borwein, Andrew Mattingly and Glenn Wightwick, "The computation of previously inaccessible digits of pi^2 and Catalan's constant," Notices of the American Mathematical Society, to appear, 11 Apr 2011. PDF.
  4. Jonathan Borwein, "The life of pi: From Archimedes to Eniac and beyond," manuscript, Mar 2010. Article PDF | Presentation PDF.
  5. David H. Bailey, "A short history of pi formulas," manuscript, Nov 2010. PDF.
  6. David H. Bailey, "A collection of mathematical formulas involving pi," manuscript, Nov 2010. PDF.
  7. Daisuke Takahasi, "Parallel implementation of multiple-precision arithmetic and 1,649,267,440,000 decimal digits of pi calculation," 3 Apr 2009. Online article.
  8. David H. Bailey, "The BBP algorithm for pi," manuscript, Sep 2006. PDF.
  9. David H. Bailey, "A compendium of BBP-Type formulas for mathematical constants," manuscript, Feb 2011. PDF.
  10. David H. Bailey, Jonathan M. Borwein, Peter B. Borwein and Simon Plouffe, "The quest for pi," Mathematical Intelligencer, vol. 19, no. 1 (Jan 1997), pg. 50-57. PDF.
  11. David H. Bailey, Peter B. Borwein and Simon Plouffe, "On the rapid computation of various polylogarithmic constants" (original paper of the BBP formula and algorithm), Mathematics of Computation, vol. 66, no. 218 (Apr 1997), pg. 903-913. PDF.