🔵
π = 3.14159... — the most famous number
The number π — the ratio of a circle's circumference to its diameter — is irrational and transcendental. Calculated to over 100 trillion digits. It appears in quantum physics, probability theory and statistics — wherever there are circles and waves.
Science
🥧
March 14 — Pi Day
March 14 (3/14 in the American date format) is celebrated as international Pi Day. In 2015 the holiday was special: 3/14/15 at 9:26:53 the date and time matched the first ten digits of π.
Dates
🧠
Records for memorizing π
The world record for memorizing digits of π belongs to Akira Haraguchi from Japan: in 2006 he recited 100,000 digits in 16 hours. The phenomenon of mnemonists memorizing thousands of digits is studied by neuroscience.
Culture