How to choose the minimum difficulty when mining with a slush pool

I am mining a single anti -minor S9 with slush grass.

There is a setting called “Minimal difficulty.”

When reading the manual, the item #8 status is displayed.

The pool automatically allocates the difficulty level corresponding to the hash speed of the miner.

my Scoring hasher and Hash speed It is consistent with the manufacturer of my mine manufacturer. 13.5 th/s

And my basic difficulties are set to 128.

However, when you read additional manuals, you will find that the minimum difficulty should be set to 1024 for 1/s and then increase to the hashnate and linear.

Depending on the table, my difficulties should be 13 times. 1024 is 13312. This is much higher than the 128 determined by the swimming pool.

What is the minimum difficulty?

I tried to understand what the minimum difficulty is, but I couldn’t find a clear and simple explanation of what this number indicated.