en.wikipedia.org/wiki/Pi

The number π is a mathematical constant, the ratio of a circle's circumference to
its diameter, ... It was calculated to seven digits, using geometrical techniques, in
Chinese mathematics ....

fivethirtyeight.com/datalab/how-many-digits-of-pi-you-have-to-have-memorized-to-be-special/

Mar 14, 2015 ... Today is Pi Day — the day each year, March 14, that follows the first three digits
of pi (3.14). And this year's Pi Day is a special one: Since — in ...

www.bbc.com/news/technology-11313194

Sep 16, 2010 ... "The [formula for picking specific digits out] was discovered in 1995, so the fact
that there are two separate pi computation records is quite new, ...

www.numberworld.org/misc_runs/pi-5t/details.html

Aug 3, 2010 ... 5 Trillion Digits of Pi - New World Record. Pushing ... (and how many digits).
Although ... There are simply too many components that can fail.

www.reference.com/math/many-digits-pi-calculated-cdd7d45d6ba58a8d

According to Numberworld, 12.1 trillion digits of pi have been calculated, as of
December 2013. ... How many combinations are there of three numbers? A:
There ...

www.quora.com/How-many-digits-of-Pi-have-been-calculated-as-of-July-30th-2016

Aug 1, 2016 ... According to Wikipedia, we are at 13,300,000,000,000 (13,3 trillion). ... Numbers (
mathematics) ... How many digits are there in value of pi?

phys.org/news/2016-03-pi-random-full-hidden-patterns.html

Mar 14, 2016 ... Random walk on pi (base 4) to 100 billion digits pic.twitter.com/TZfewZoF28 ...
For example, at position 768 in the pi digits there are six 9s in succession. ....
How many have noticed that, this year, "pi day" is 3/14/16, the ...

www.piday.org/million/

One Million Digits of Pi. 3.... Pi Clock. More Pi Stuff. News & Events: Legislating
Math · Videos: Mathematical Pi Song · News & Events: Listen to how tasty this pie
...

blogs.scientificamerican.com/guest-blog/how-many-digits-of-pi-do-you-really-need-to-know-find-out-with-this-bar-bet/

Mar 14, 2015 ... Yet there is an inexplicable nerdy subculture far removed from real mathematics
that obsesses with memorizing huge numbers of decimals of π ...

www.eveandersson.com/pi/precalculated-frequencies

We cannot determine the last digit of Pi, because there is no last digit, the .... Do
the numbers 0-9 in dec, when converted to binary, yield just as many 0's as 1's?