The additional division modes were implemented with float division then rounding to match float > int conversion in existing float to int node. As pointed out in the bug report the precision here is limited. This patch replaces the float division with integer math which increases the precision to much higher numbers. Divide Round by due to the way it is calculated has less precision than Divide Floor and Divide Ceil. Pull Request: https://projects.blender.org/blender/blender/pulls/128123