assuming a yield of 3 per hour, that's 83000 hours. 8 hours a day makes 10,500 days, divide by thirty to get 342 mythical man months. I call them mythical because writing 125 tests per person per week is unreal.

can any wise soul out there on SO shed some light on what sort of mythical men write unreal quantities of tests for large software projects? thank you.

update chrisw thinks there are only 20k tests (check out his explanation below).
PS I'd really like to hear from folks who have worked on projects with large test bases