[number] + [counter] + は
は straight after a number and its counter means "at least": the speaker gives a figure they are sure of, and the real one may be higher, but not lower. The noun being counted keeps its own particle; は goes on the number.
It fits targets and wishes as well as counts and estimates.
Both follow a number. は sets a minimum and sounds matter-of-fact; も says the number is surprisingly large.
With a negative verb, the figure is not reached: "not even", "less than".