I tried to create a custom function fact() with BigInteger parameters for counting factorial with big numbers.
If I use just the function itself then there is no issue but it is not working when I use this function with another mathematic operation.
E.g. fact(5) ---> result 120 - OK
fact(5)+1----> expression not working
If I change parameters from BigInteger to Int or Decimal then everything is working but I can't calculate factorial for bigger numbers (e.g fact(28) is too large value).
Please add biginteger support!