NPR

The Woman Who Calculated 31 Trillion Digits Of Pi

Emma Haruka Iwao, who has been fascinated with the mathematical constant since childhood, set the Guinness World Record for most accurate value of pi.
Calculating more than 31 trillion digits of pi took months for Emma Haruka Iwao and her team, who beat the previous record for the most accurate value of pi by trillions of digits.

Emma Haruka Iwao grew up fascinated by pi. Now, she's computed over 31 trillion of its digits.

Iwao set the newest for the most accurate value of pi on Thursday. The Google employee and her team calculated 31,415,926,535,897 digits of pi – crushingby trillions of digits.

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