Counting from 32,768 to 32,868 was really tough short term memory training

My mental condition has recovered.
I restarted counting numbers when bathing.
I counted from 300 to 0 as usual.
I was relieved that I was able to count smoothly.

Next, I tried to count bigger numbers, more than ten thousand.
Big number I can easily imagine is power-of-two numbers like 256, 65536, 1048576, and so on, for I've been familiar with the theories of computer.

For starters, I counted from 32,768 to 32,868.
Just counting 100 numbers, but it was really exhausting.
First, it wasn't easy at all to always remember thirty-two.
Many times I began with "thirty thousand, seven ...," and corrected to "thirty-two thousand, seven hundred and ...".
And then remembering the rest of a number I was to count was also difficult.
I guess I counted several numbers double or triple, because I had just forgotten counting a certain numbers and counted it again.
This is just counting numbers, but it's really tough training of short-term memory retention.