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Network World - That's right, March 14 is international Pi Day. Get it -- pi is 3.14, and March 14 is 3/14?
Most everyone knows pi -- the ratio of the circumference of a circle to its diameter. But how much do you really know about this magical number? Below are 28 fun facts about pi split up into tidy categories. Enjoy!
[ MORE PI DAY: 10 Awesome ways to celebrate Pi Day 2013
EVEN MORE PI DAY: 10 More ways to celebrate Pi Day
FUN FACT: How Indiana tried to redefine pi ]
-Pi Day is also Albert Einstein's birthday, along with the birthdays of Apollo 8 Commander Frank Borman, Astronomer Giovanni Schiaparelli, and last-man-on-the-moon Gene Cernan.
-There is a pi cologne.*
-Computing pi is a stress test for a computer -- a kind of "digital cardiogram.*
-The record for calculating pi, as of 2010, is to 5 trillion digits (source: Gizmodo).
- If you were to print 1 billion decimal values of pi in ordinary font it would stretch from New York City to Kansas (source: Buzzle).
- 3.14 backwards looks like PIE.
- "I prefer pi" is a palindrome.
-If you divide the circumference of the sun by its diameter, what will you have? Pi in the sky! (source: Jokes4us.com)
- What do you get if you divide the circumference of a jack-o'-lantern by its diameter? Pumpkin pi! (source: Jokes4us.com)
-There's a reference to Pi in "Star Trek." Check it out here.*
-Many movies have been made about pi, including "Pi: Faith in Chaos," which is about a man who goes mad trying to rationalize pi.*
-Other movie references to pi include pi being the secret code in Alfred Hitchcock's "Tom Curtain" and "The Net" with Sandra Bullock.*
-In the book "Contact" by Carl Sagan, humans study pi to gain awareness about the universe.*
-The first million decimal places of pi consist of 99,959 zeros, 99,758 ones, 100,026 twos, 100,229 threes, 100,230 fours, 100,359 fives, 99,548 sixes, 99,800 sevens, 99,985 eights and 100,106 nines.*
-There are no occurrences of the sequence 123456 in the first million digits of pi -- but of the eight 12345s that do occur, three are followed by another 5. The sequence 012345 occurs twice and, in both cases, it is followed by another 5.*
-The first six digits of pi (314159) appear in order at least six times among the first 10 million decimal places of pi.*
-At position 763 there are six nines in a row, which is known as the Feynman Point.^
-The fraction 22/7 is a well-used number for Pi. It is accurate to 0.04025%.^
-Another fraction used as an approximation to Pi is (355/113), which is accurate to 0.00000849%.^
-A more accurate fraction of Pi is (104348/33215). This is accurate to 0.00000001056%.^
-The square root of 9.869604401 is approximately Pi.^
-In the Greek alphabet, pi (piwas) is the 16th letter. In the English alphabet, p is also the 16th letter.*
-Check out this slideshow of ways to celebrate Tau Day, an alternative calculation to Pi Day.