Pi Day: five fun facts about 3.14
March 14, or 3.14, is Pi Day. Get it? Pi Day celebrates all things related to the mathematical constant that measures the ratio of a circle's circumference to its diameter. Here are five things you should know about π.
2. Computers can't solve it
A pair of Japanese and US computer whizzes currently holds the record for calculating the most digits of pi – to five trillion decimal places. In 2010, Shigeru Kondo, a Japanese system engineer and Alexander Yee, an American computer science student, eclipsed the previous record of 2.7 trillion places. The pair used a desktop computer with 20 external hard disks that cost about $18,000 to build. It took 90 days to make their calculation.