Are these numbers random? For example the Golden Ladle Award requires 137 meals made with the Awesome Pot. Why 137 and not 130; just to keep it random? Not that I mind I think its different from most games where it is every 50 or 100 of something.
Oh it IS prime isn't it? That's beautiful. Also, research shows that expected, but sporatic rewards are more effective at getting people to like stuff than predictable rewards (e.g multiples of 50).