Pi day is an annual festival to celebrate the mathematical constant π, and the time is set at 14 in March. Generally, it is celebrated at 1: 59 in the afternoon to symbolize the six-digit approximation of pi 3. 14 159, and sometimes it is even accurate to 26 seconds to symbolize the eight-digit approximation of pi 3.1415926; People who are used to 24-hour timing celebrate at 65438+ 0: 59 am or 3: 9 pm (65438+05: 9 am). The mathematics departments of some universities in the world hold parties on this day. Calculate pi. In 2009, FabriceBellard, a famous French programmer, used a personal PC, and it took 1 16 days to calculate 2.7 trillion digits after the decimal point, breaking the record of pi operation kept by a supercomputer. At the same time, FabriceBellard has made amazing achievements in pi algorithm. 1997, he proposed the fastest algorithm formula of pi.
Perhaps because of its simple definition, π is ubiquitous in mathematical formulas, and its frequency and position in popular culture are much higher than other mathematical constants. At MIT, some college students' greetings include "3. 14 159". In an acquisition of Google on 20 1 1, Google chose a series of famous constants as quotations, including π. Piday.org, the official website of Pi, not only collects all kinds of interesting stories about Pi, but also stores with Pi as the theme. July 22nd: Pi approaches the day.
22/7 is an approximation of π. According to American date notation, today is July 22nd. 22/7 is greater than π. Interestingly, it is closer to π than 3. 14. So the approximate date of pi day is actually more accurate than that of pi day. 1592 March 14: the ultimate pi day. 1592 March 14 6: 53 a.m. The American notation is 3/ 14/ 15926:53, which corresponds to pi.