Akira Haraguchi,69, is a legend among memory masters, or having memorised more of pi’s digits than anyone else. Here he talks about why he does it and how he will be celebrating pi’s sizable dayPi Day 2015: A sweet treat for mathematics fans
People enjoy enjoyed memorising the digits in pi since at least the beginning of the 19th century.
Back then only a few hundred digits were known,so it was barely more of a challenge than memorising a long poem.
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Source: theguardian.com