A 'normal' sequence of numbers is one in which no digit occurs more frequently than any other. The mathematical equivalent of White Noise.
'Normality' is usually considered to be one of the tests for.
The Pi sequence has now been computed to many trillions of digits, and appears to pass all tests for randomness, including 'normality'. But the conjecture that π is 'normal' has not yet been proven or disproven.
See: Are the digits of Pi random? US Berkeley Lab.
Note : No 'naturally occurring' mathematical constant has ever been proved to be 'normal' (or not normal) Examples include the square root of 2, and the natural logarithm of 2.
Ideas for new topics, and suggested additions / corrections for old ones, are always welcome.
If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !
Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.
( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)