496?
"Only" 100 burpees on the last day, but between now and then we will have done just over 5,000 of them - for which each participant will donate 1 penny per burpee to our group-selected charity. I really like that part. It is just a straight linear progression, 1 extra burpee each day. I focus on THAT, not the total number over the 100 days.
One thing is sure, I will be a LOT better at burpees by the time this is over!

