There is no zero in the first 31 digits of Pi.
Pi is irrational.
The Bible uses a value of Pi of 3. Here is a verse from I Kings 7,23: And he made a molten sea, ten cubits from one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass it about.
The letter Pi was first used by Welshman William Jones in 1706 and was later adopted by Euler and soon became a standard notation
Pi is the 16th letter of the Greek alphabet.
A long time ago people thought there was an illness attached to trying to 'square a circle' called Morbus Cyclometricus
Since the digits in Pi appear random and since the digits do not stop, it is possible in theory to hide messages and even software in Pi.
Pi in base Pi is 10
At position 763 there are six nines in a row. This is known as the Feynman Point
In 240 B.C., Archimedes determined pi to be between 223/71 and 22/7
In 150 A.D., Ptolemy determined pi to be approximately 377/120
In 480 A.D. in China, pi was found to be approximately 355/113
In 1150 A.D. Bhaskara determined pi to be approximately 3927/1250
In 1579, Viete determined pi correctly to 9 decimal places by using polygons that had 393,216 sides.
In 1610, Van Ceulen used a 2^62 sided polygon to compute pi to 35 decimal places
In 1650, John Wallis said pi/2 = Gamma(2i)(2i) / Gamma(2i-1)(2i-1) with i=1,2,3
In 1674. Leibnitz said pi/4 = Sigma(-1)^i / (2i+1) with i=0,1,2,3
In 1949, the ENIAC computed pi to 2,037 decimal places after 70 hours
In 1986, Cray-2 Supercomputer computed pi to 29,360,128 decimal places after 28 hours
In 1988, Yasumasa Kanada computed pi to 201,326,000 decimal places
In 1990, The Chudnovsky brothers computed pi to 1,011,196,691 decimal places
In 1999, Pi is computed to 206,158,430,000 decimal places by Yasumasa Kanada and Daisuke Takahashi.
In 2002, Pi is computed to 1,240,000,000,000 decimal places by Professor Yasumasa Kanada.
I prefer pi is a palindrome
Einstein's birthday is March 14, which is the 3rd month, 14th day or 3.14
In Carl Sagan's science fiction novel Contact, Sagan contemplates the possibility of finding a signature embedded in the base-11 expansion of ? by the creators of the universe. In the Star Trek episode "Wolf in the Fold", when the computer of the Enterprise is taken over by an evil consciousness, Spock tells the computer to figure Pi to the last digit, which incapacitates the entity as all computer resources are devoted to this impossible task.