This server is a database of more than
215,000,000 mathematical constants
like Pi, E, Catalan or Euler-Mascheroni constant
with more than 2 billion digits.
Enter a number and the program
will find what the number is made of.
You can enter a number
from 5 to 64 digits
Hébergé par le LaCIM

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• About this server and advanced search
• Records of computation
• Tables de constantes
• Bibliography
• Simon Plouffe's home page
• Recent additions of tables
• Example of automated report by mail
• Histoiry of the computation of Pi
• Interesting graphics and summaries
• Table of a few approximations of Pi
•
Articles of Ivars Peterson (MathTrek)
  From number to formula
  A passion for Pi
  Pick a digit, any digit
  Next in line
• A question of Numbers by Brian Hayes
Other friendly sites of interest
• Favorite Mathematical Constants of Steve Finch, an excellent collection of essays about constants and their numerous ramifications.
• Xavier Gourdon and Pascal Sebah Mathematical Constants Algorithms and programs.
• Integer Sequences Server of Neil Sloane, this is the On-line version of the Encyclopedia of Integer Sequences. Neil J.A. Sloane/Plouffe.
• Math Forum Internet Collection A descriptive list of many sites related to mathematics.
• Eric Weisstein's World of Mathematics An on-line encyclopedia of mathematics.
• Function Calculator of Xiao Gang, an interactive calculator to plot, compute and test numbers.
• The prime numbers page of Chris Caldwell, the reference point for prime numbers.
• LaCIM of the Université du Québec à Montréal, Laboratoire de Combinatoire et Informatique Mathématique.
• Wavelet discussion group A series of pages dedicated to wavelets by Daniel Lemire.
• L'univers de Pi of Boris Gourevitch (in french).

The stylized Pi is from Yves Chiricota, Montréal 1995, graphic conception is from Renée Othot, 1999.