The length of a number in base is the number of digits in the base- numeral for , given by the formula
where is the floor function.
The multiplicative persistence of an -digit is sometimes also called its length.
The length of a number in base is the number of digits in the base- numeral for , given by the formula
where is the floor function.
The multiplicative persistence of an -digit is sometimes also called its length.
Weisstein, Eric W. "Number Length." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/NumberLength.html