Problem 44071. Smallest n, for n! to have m trailing zero digits
For given positive integer n, its factorial often has many trailing zeros, in other words many factors of 10s. In order for n! to have at least "m" trailing zeros, what is the smallest "n" ?
Example: factorial(10) = 3628800 factorial(9) = 362880 In order to have 2 trailing zeros on factorial, the smallest n is 10.
Optional: Can you make an efficient algorithm for a very large m?
Solution Stats
Problem Comments
Solution Comments
Show commentsProblem Recent Solvers50
Suggested Problems
-
1405 Solvers
-
462 Solvers
-
Create a Multiplication table matrix...
518 Solvers
-
324 Solvers
-
7323 Solvers
More from this Author9
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!