I use online calculators...

The one I usually use didn't work well with 1000 and 2000 dfs

BUT I just found this

http://davidmlane.com/hyperstat/F_table.html

I just put used 100,000 and 200,000 dfs.

AND I checked with the percentile point of 1.

I know that as the df goes to infinity that the mean converges to 1.

And it 'worked'.

There's also these tables....

http://www.danielsoper.com/statcalc/calc08.aspx

Note that there are F tables if you look on top.