Every stat-unit is 2^28 keys (268,435,456). There are 86,400 seconds in a day.
So, if you do 1 stat-unit per day, you are crunching (a pathetic) 3106.89 keys/sec, right?
268435456 keys/stat-unit * 1 stat-unit/day * 1/86400 days/second = 3106.89… keys/second
And therefore, if you are crunching 310,689 keys/sec, you should be doing 100 stat-units/day, right?
This calculation matches my output. Does this jibe with everyone else's output and keyrates?