I agree plots would be nicer (maybe I'll add them)
regarding the last column it's the number of iterations, google benchmark will make less iterations if individual iterations take more time.
sys.maxsize is the maximal number of digits a _long_ in python may have.
the `10*sys.maxsize` was just an example to show that, even in Python, long objects have a limit (although very big : 10*9223372036854775807 on 64 bits).
I honestly didn't wait to see if the interpreter will effectively complain about its size (it takes why too much time).
EDIT : According to gvx's comment those limits are not correct (sys.maxsize is not technicaly the max of digits possible, due to a bad interpretation of what Py_Size means on my side)