Feynman point
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The Feynman point comprises the 762nd through 767th decimal places of π, consisting of the digit 9 repeated six times. Since π 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 π 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."
For comparison, the next sequence of 6 repeated digits starts with 8 at position 222,299. For the remaining digits, zero (0) is the last known to repeat 6 times, starting at position 1,699,927.
External links
- Feynman Point (http://mathworld.wolfram.com/FeynmanPoint.html) from MathWorld
- pi search page (http://www.angio.net/pi/piquery)