Announced that 'the day of Pi' has set a new record of Pi and achieved it was a Google engineer from Japan

by Rob

Is calculated by dividing the circumference by the diameter circle ratio is generally known in the sequence of digits of "3.141592 ...", never divisible by calculation irrational number it is. March 14 is designated as " the day of the circle " after the numerical value of the circle , and the research team of Emma Haruka Iwao et al. Announced that it has achieved the world's new record of Pi.

Pi in the sky: Calculating a record-breaking 31.4 trillion digits of Archimedes' constant on Google Cloud | Google Cloud Blog
https://cloud.google.com/blog/products/compute/calculating-31-4-trillion-digits-of-archimedes-constant-on-google-cloud

How Emma Haruka Iwao broke the Guinness World Records title for the most accurate value of pi
https://blog.google/products/google-cloud/most-calculated-digits-pi/

Pi is rolling all over the day, so you can look at a watch, look at the wheel of a car, or imagine the pi at a momentary moment. In addition, I would be intrigued by the fact that it will last forever without being divisible, and there should be a few people who have been desperately memorizing the number of digits of the pi after having studied at school in elementary school.

Also, the calculation of the pi will now be done by the computer, and experts are using the supercomputer to calculate the pi of a large number of digits. So far, the world record of the Pi calculation was about 22 trillion 400 billion recorded in 2016, but Mr. Iwao, a Google engineer from Japan on March 14, 2019, the day of the pi Announced that their team has updated their new record of Pi calculation. The calculated number of digits is "31, 415, 926, 565, 358, 7 9", which is the number of digits after the "3. 1415 925 358 597 ..." of the pi.

Mr. Iwao used the Google Compute Engine, a high-performance computing service provided by Google Cloud Platform , Google's cloud computing platform, without using a supercomputer in this Pi calculation. This is the world's first time that the cloud service was used for world record scale pi calculation.

by maja kuzmanovic

Mr. Iwao, who has been fascinated by the circle since he was a child, entered Tsukuba University, where Professor Daisuke Takahashi , who was the world record holder of the circle calculation, is enrolled, and Professor Takahashi taught him about the circle calculation. That he received

We used y-cruncher , a calculator program, to calculate the ratio of pi to 25 virtual machines through Google Cloud Platform. "The biggest challenge in Pi calculation is that it requires a huge amount of storage and memory for the calculation," said Mr. Iwao, who needed as much as 170 TB (terabyte) of data in this calculation. is.

Mr. Iwao continued to calculate in the virtual machine for about 121 days, and finally succeeded in obtaining the circle of 31 415 926 535 859 digits. "It was only after confirming that the calculations were correct that I could realize that this was an exciting outcome for our team," says Iwao.