The electron-volt, eV, is a unit of energy (1eV = 1.602 ·10-19 J, 1 MeV = 1.602 ·10-13 J). Since the unit of momentum is an energy unit divided by a velocity unit, nuclear physicists usually specify momenta of nuclei in units of MeV/c, where c is the speed of light (c = 2.998 ·108 m/s). In the same units, the mass of a proton (1.673 ·10-27 kg) is given as 938.3 MeV/c2. If a proton moves with a speed of 15300 km/s, what is its momentum in units of MeV/c?