the FFA of the Nose was Lynn Hill, in the early 90's. She did it free over a few days, then freed it in 24 hours! Some guy named Scott I think freed it, but only toproped the cruxes, then in the last few years, Tommy Caldwell and Beth Rodden Caldwell team freed it, then Tommy came back and freed both the Nose AND the Salathe wall in 24 hours!!
the vid of Potter soloing the Nose is insane, but not a free ascent. It is quite ultralight for being solo - compare his gear to the standard ascent of the nose - no 3 day haulbag, 3 days of food and WATER, no portaledge, no multitude of ropes, no triple set of cams - he had some gear, but for a mostly ropeless solo, that is very minimal gear - consider how he had to aid - just always keeping more than one piece in - then consider that the spots he'd be aiding would be then thin parts... it may not be the fastest of the fastest for solo on the Nose, but it is ultralight, it is not all free, and it is crazy. I can see his point on this being safer than the average ascent - no big haul bags to mess up (a big haul bag screw-up can drop it the length of the haul rope onto your anchor - yikes!), less time to get stuck in a big storm, fewer rigging mistakes to be made, very little reliance on ropes, pro, etc - in some ways it is safer, if you are that good....... for the rest of us, .....