Problems when 'mod' quite big number (like factorial).

mod(factorial(22),10000)
mod(factorial(23),10000)

The answers should both be 0. However, the answers are 0 and 2864 seperately.

How to solve this problem?

Thank you very much!

Answer 1

[David Hill]

x=sym('23');
mod(factorial(x),10000)
x=sym('24');
mod(factorial(x),10000)

[Songbai Jin]

Thanks for your answer. I'd really appreciate it if you could help with the other two similar questions I've asked.