The required sets were: 16, 17, 14, 14, >= 20 with a 2 minute rest in between. I just barely managed to finish 20 in the last set.
The next step in the challenge is to do an exhaustion test: do as many push ups as you can in a row with no rest. This determines what how your sets in the next few weeks will be organized.
My first exhaustion test was back before week 1 started, and I managed 23 push ups.
I'm hoping to do at least 30 now that I have a few weeks under my belt...but we'll see how things go :)