https://youtu.be/Hj4uW5FdZMc?t=303

Saitama jumped from the moon back to Earth in about 4 seconds
The distance from the earth to the moon is about 384,400 kilometers.
384,400 kilometers/4 seconds = 96100 kilometers per second
or Mach 282647.05882353
so Saitama is about..
Mach 282647
also this was requested by judgement-cut the best judge that will ment your cuts