Google Smashes Pi Record For Pi Day |

Written by Sue Gee |

Thursday, 14 March 2019 |

To mark this year's Pi Day, Google has announced a new world record of 31.4 trillion digits for our favorite irrational mathematical constant, Pi. March 14 is celebrated as Pi Day because it is represented by 3.14 - the first three digits of a fundamental mathematical constant that has the mystery characteristics of being transcendental and irrational. If you want to know more about its properties see Transcendental Pi. The previous Guinness World Record for the most accurate value of Pi was set by Peter Trueb in 2016 with 22.4 trillion digits. This has now been convincingly overtaken by Google's Emma Haruka Iwao who computed 31,415,926,535,897 decimal digits, which is 26,090,362,246,629 hexadecimal digits. If you want details of the method these are supplied in a Pi Day blog post by Alexander Yee who explains that the computation used the Chudnovsky formula and took 121 days beginning on September 22, 2018 and ending on January 21, 2019. Verification was done twice using Bellard's 7-term BBP and the original 4-term BBP formulas. These were run in December and took 20 and 28 hours respectively. Both the computation and verification runs were done using y-cruncher v0.7.6. The statistics are included in this screen dump: Source:Alex Yee Numberworld.org blog (click to enlarge) The importance to Google of the achievement of 3.14 trillion digits is that this is the first time that the record has been broken using the cloud. As Emma Haruka Iwao claims in her blog post Pi in the sky, it proves Google Cloud’s infrastructure works reliably for long and compute-heavy tasks. In this video, which has the title , "A recipe for beating the record of most-calculated digits of pi." Emma Haruka Iwao outlines how and why she set out to beat the world record. The video lasts for 3 minutes and 14 seconds (notice the Pi theme), which is rather more than is required, and the closed captions can be very misleading. For example, she says had been told by her Computer Science professor, himself a former world record holder for digits of Pi, that, to paraphrase slightly, from an engineering standpoint there is no need for trillions of digits of Pi and that 20 to 30 digits are sufficient. At this point I couldn't make out the "for what" bit of the sentence. The captions read:
The sentiment that a couple of score of digits of Pi are all that we could possibly need had already been aired in a Pi Day post from 2017. In How many digits of pi do we really need? Brad Plumer cited Marc Rayman, the director and chief engineer for NASA's Dawn mission According to Rayman, with 40 digits of Pi, you could calculate the circumference of the
Plumer noted: Emma's rejoinder would be that from a computer software point of view it is interesting to have more digits - and certainly as a Google Cloud Developer Advocate's point of view Pi is great for promotion and marketing. In her blog post:
Her blog post also gives details of how customers can use the pi.delivery service, essentially to play and experiment with digits of Pi at the rate of $40 per day. Happy Pi day.
## More InformationA recipe for beating the record of most-calculated digits of pi Google Cloud Topples the Pi Record How many digits of pi do we really need? Eh, not that many, says NASA. ## Related ArticlesNon-Computable And Other Numbers It's Pi Day 2018 And Google Gets In On It With A Doodle Happy Pi Day! Pi Day Of The Century The Life Of Pi - Yes It's Pi Day Celebrate Pi Day It Contains All Human Knowledge 60 trillionth binary digit of pi-squared calculated Yahoo! Gets to the 2 Quadrillionth bit of Pi - it's zero The Programmer's Guide To The Transfinite To be informed about new articles on I Programmer, sign up for our weekly newsletter, subscribe to the RSS feed and follow us on, Twitter, Facebook or Linkedin.
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Last Updated ( Thursday, 14 March 2019 ) |