# Google refreshes its record: Accurate pi to 31 trillion decimal places

Yesterday was March 14, not only the so-called White Valentines Day, but also the Day, i.e. the Pi Day and the International Mathematics Festival.

On such a math enthusiasts day, Emma Haruka Iwao, a Google engineer from Japan, set a new world record by successfully calculating Pi to 31 trillion decimal places, or 31415926535897, to be exact.

The previous record was set in 2016 at 22459, 1577, 18361, which means that the Google employee has added nearly 10 trillion bits.

According to Iwao, he uses Googles cloud computing engine and runs about 25 virtual machines for 121 days. Peter Trueb, the creator of the 2016 record, used only one computer, which had a large 6TB hard drive, but lasted only 105 days.

Of course, such calculations do not make much sense to the real world. NASA can send a rocket into space only by taking the 15 decimal places. In addition, modern astronomical computational objects and modern physical computational atoms only need to take the 40 decimal places.

Data show that the circumference rate is an infinite non-circular decimal. Chinese mathematicians Liu Hui and Zu Chong took the lead in accurately calculating the factorization to the next seven decimal points, i.e. the most classic 3.1415926, which lasted for more than 1000 years.

Source: Fast Technology Responsible Editor: Wang Fengzhi_NT2541