No 32

Pi is 3.14159265358979323846....

The decimal digits do not stop and they do not repeat. Pi is irrational.

At present Pi is known to an incredible 206,158,430,000 decimal places after the point.

The calculation was completed on 20th September 1999.

In case you need to know, the 206,158,430,000th digit (not counting the initial 3) is 3.

The computer used was a HITACHI SR8000 at the Information Technology Center, Computer Centre Division (old Computer Centre,) University of Tokyo. Congratulations should be sent to : kanada@pi.cc.u-tokyo.ac.jp

 

Do each of the digits occur equally often?

The following tables gives the number of each of the digits that occur in the first 6 billion decimal places:

In numerical order 0 599963005 1 600033260 2 599999169 3 600000243 4 599957439 5 600017176 6 600016588 7 600023761 8 599975659 9 600007998

In order of frequency 1 600033260 7 600023761 5 600017176 6 600016588 9 600007998 3 600000243 2 599999169 8 599975659 0 599963005 4 599957439

1 is the most frequently occurring digit making up 10.00055433% of the total.

4 is the least frequent making up only 9.99929065% of the 6 billion digits.

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