Hi @AnotherFraudUser @PBJ

This issue seems to happen after a certain range/limit. I originally tested with some Long numbers, and they all passed, and I was about to reply that I did not have any issue on my side because of that, then I thought of testing with the numbers that @PBJ used, and unfortunately I got the same results too.

Some test results:

Adding the number 1 at the beginning as an additional digit:

Then I used the Math Formula (Multi Column) to go faster. At first, I did 4 columns in total (including the 2 above). Then I added @PBJ test data in column5. The first 4 columns produced the correct results, but for column5, it produced the same results as @PBJ:

I also processed column4 and column5 via Column Expression:

I’m guessing it’s the same `mod()`

function in the Math Formula and the Column Expression.

But the issue might not be with the mod() function, but rather how these numbers are being recognized. Here’s an additional test that I did. I did column4 / 10 and also column5 / 10. Here are the results:

I’m not sure how these numbers are coming up.

Here’s my workflow if you want to play with these numbers: Math Formula mod issue.knwf (16.3 KB)