# Pi to two million digits

is a book I chanced upon in the library. The book consists, as the title states, of the constant $\pi$ to two million digits in 296 pages. My first reaction was, what is it doing in a university library? I’m all for esoteric number theory, and computing the digits of pi is as fruitful an endeavour as perhaps practising corporate law/finance. But in this internet age, why would you need a printed list of the digits? I can only imagine it’s because purchasing is done by people who do not actually read the books. Still one can find recreational uses for the book. See the reviews of Pi to five million digits – an expanded version – on amazon. For good books on pi, I personally recommend A history of Pi by Petr Beckmann and the resource book Pi: A Source book by Berggren, Borwein and Borwein. Not forgetting Borwein and Borwein’s Pi and the AGM. And why do all the last names begin with B?

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