The current world record is 988 km/h (614 mph) by Joseph Kittinger, set at high altitude where the lesser density of the atmosphere decreased drag.
The current world record is 1173.21 km/h (729 mph) by Felix Baumgartner who skydived from 24 miles above earth on October 14th,2012. The record was set due to the high altitude where the lesser density of the atmosphere decreased drag.