Connecting at SFO yesterday I saw an all white 747 taxi by. It was too far away for me to see the tail number. Anyone know what it is? (I've seen the creepy white planes at IAD but even they have a stripe and they aren't 747s) This 747 was spotted about 3:30 pm and looked like it was at a gate (probably around the end of the int'l terminal) around 4:30 as we taxied away. The departure monitor also showed a flight headed to Victorville later in the day - never seen that on a departure board! From flightaware looks like it was a UA 772.