mining.thegenesisblock.com
Pick a Jupiter in October, add in hosting fee, change power costs to 0, change pool fee to 1.5%.
There's no way the diff increase is averaging or going to average 60% a month as their default has it.
Yes it has been, it's pretty simple math. Remember, each 2016 blocks are being solved in 11 days or less right now and each increase has been over 20%. Compound that ~3 times per month and 60% appears conservative.