Daniel Tammet did this.
he is from Britain and has a rare combination of asbergers and synthesia. he says that when does calculations and long memorization that he is not consciensly doing it, that instead he sees an pictographic representation of the quantity.
Tammet recited only 22, 514 digits.
Hiroyuki Goto from Japan in 1995 was the first to do 42195 digits . This number has since been surpassed.
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There are too many digits, but I'll give you the ones I've memorized: 3.141592653589793238462643383279502884197169399375105820974944... ~ To the above answer: That's not what the question is asking. Answer: Digits of pi used to be calculated by dividing the circumference by the diameter of a circle. The same answer will come out for all circles. Now, we have machines that can crunch up millions of digits in a relatively short amount of time.
Because Pi is known to be an irrational number it means that the digits never end or repeat in any known way. But calculating the digits of Pi has proven to be an fascination for mathematicians throughout history. Some spent their lives calculating the digits of Pi, but until computers, less than 1,000 digits had been calculated. In 1949, a computer calculated 2,000 digits and the race was on. Millions of digits have been calculated, with the record held (as of September 1999) by a supercomputer at the University of Tokyo that calculated 206,158,430,000 digits. (first 1,000 digits). However, learning 3.141, is all that is necessary. But you can go on and on, to infinity, and never find the exact circumference of a circle. I have only memorized 205 digits of pi; and yes I do use it to find the circumference of a circle.
1.2411 trillion digits (1,241,100,000,000) digits of pi have been dicovered.
3.14159265358979323864062384626238832795028841971693939937510582097494459230781640628620898628034825342117067 These are the hundred digits of pi
The first 55 digits of pi after the decimal point are: 3.1415926535897932384626433832795028841971693993751058209