Pi Day Spotlights One of Math's Most Seductive Numbers - NBC Chicago
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Pi Day Spotlights One of Math's Most Seductive Numbers

Someone has memorized 70,000 digits of pi's decimal expansion

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    Pi Day Spotlights One of Math's Most Seductive Numbers
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    It may seem irrational to some, but we celebrate the number pi (π) every year on March 14, since 3/14 represent the first three digits of pi's decimal expansion.

    NBC News reports that pi is more than just a good excuse to eat pie in the middle of March. It characterizes the perfect circle in a Platonic world, because it represents the constant ratio of the circumference to the diameter.

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    (Published Tuesday, March 14, 2017)

    But it does more than that, too. Pi is part of Heisenberg's uncertainty principle and a formula that prices risk.

    It's captured the popular imagination with its irrationality, which means it can't be represented as a fraction. A computer calculated pi down to the 22,459,157,718,361st decimal place, while Rajveer Meena from India has a Guinness Book world record for reciting 70,000 of those decimal places.