The speed of light, also referred to as light-speed, or the warp threshold, is the velocity that photons travel in a vacuum.
This constant, usually denoted c, is equal to precisley 299 792 458 m/s, and is equivelant to the speed of Warp 1.
The Phoenix, piloted by Zefram Cochrane, was Earth's first ship to travel faster than the speed of light. (Star Trek: First Contact)