74 because my quarry somehow managed to make a cobblegen and I realized thus only some realtime days after placing it. (hooray for 25/7 server)
luckily it was my 4th max size quarry and I was already voiding cobble.......still though, I don't want to know how much charcoal and ethanol got wasted to void cobble. (especially the ethanol as apparently my treefarm can't keep up with biomass production thus I am out of saplings pretty much all the time. I do have plenty of apples though, even while using them for fruit juice to get more biomass out of my sapling's and of course for the mulch that is needed to make biomass.)