Feynman point

The Feynman Point is the name given to the 762nd through 767th decimal places of Pi, consisting of the digit 9 repeated six times. Since Pi is an irrational number with an infinite non-repeating decimal expansion which may well be normal, any given sequence of any length can be expected to be found given enough digits, but it is the appearance of the sequence after relatively few digits which makes the Feynman Point a mathematical curiosity. The name refers to a remark made by the physicist Richard Feynman, expressing a wish to memorise the digits of Pi as far as that point so that when reciting them, he would be able to end with "... nine, nine, nine, nine, nine, nine, and so on."

External link:

• http://mathworld.wolfram.com/FeynmanPoint.html