Problem 44067. The last non-zero digit of a factorial

For given positive integer n, what is the last non-zero digit of n!?

Example: factorial(11) = 39916800

Last non-zero digit is 8.

Optional: Can you make an efficient algorithm for very large n?

Solve

Solution Stats

68.7% Correct | 31.3% Incorrect
Last Solution submitted on Oct 04, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers73

Suggested Problems

More from this Author9

Problem Tags

factorial

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!