This is not a big deal, but I noticed there is a dedicated website (with books, apps etc) for performing 100 pushups: hundredpushups.com and I did it today. Here's my badge to prove it!
I don't recall doing more than 60-70 ever, at least not in one set without any pauses.
Not surprisingly, the last 30 were pretty challenging. The final ten were pure agony. I guess the only reason to keep going after 90 was the fact that I was too close to 100 to quit.
I'm happy for the achievement. Upper body and core strength are important for runners, especially if you are aiming for ultra trail running in the Alps with a backpack like me.