Thanks for running the numbers. I figured that 50,000 hydrogen atoms (or protons, almost the same from a mass/energy standpoint) wasn't enough to even produce a noticeable "pop!", let alone something usefull.
No, but I think that it's more than we have ever made at one time before, so it is a significant accomplishment.
When we manage to make 1.00 mg of anti-hydrogen, and assuming 100% efficiency in annihilation, then we'll be cooking. (180 GJ, or equivalently, 49.9 MWh...)