What is the maximum value of 'Handler_read_rnd_next' status???

I had try to increasing the ‘Handler_read_rnd_next’ status value.
But I couldn’t reach the maximum value.
I want to know the maximum value of that status.

I assume that, start increasing 0 value to maximum value, and reach the maximum value, then return to 0 value and increasing again.
Because one DB server was increased that value, but some time later, that value was decreased.
DB server is MariaDB 10.1.22
So I want to know that maximum value.

Do you know that maximum value???
Thank you.