# π

p is a remarkable number. Books, chapters and web pages have been written to describe its various facets. There are even people crazy about it.

- A Common Book of Pi
- Eve Andersson's Home Page. Poems about the number and a non-trivial trivia game

Have you noticed that

- The last 5 digits in the expansion I cite are a palindrome 32823
- There is another one starting with th 19th digit: 46264
- Among 115 digits after the decimal point there are the following pairs: 33, 88, 99, 44, 99, 11
- There is a 5-digit stretch consisting entirely of powers of 2: 82148
- There is another consisting of multiples of 3: 69399

I also wrote a page, almost a lesson plan, suitable for middle schoolers. Determination of p.

The decimal digits of π are computed one by one. The hexadecimal digits may be computed independently by the Spigot algorithm.

### References

- J. Arndt, C. Haenel,
*π Unleashed*, Springer, 2000

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