Let the roast sit at room temperature for at least 1 hour. Preheat the oven to 375°. While the oven preheats, coat the outside of the roast with salt and pepper on all sides. Place the roast fat side up in a shallow roasting pan. Bake for 1 hour, and then turn off the heat.  DO NOT OPEN THE OVEN. Let the roast sit in the oven. 30-40 minutes before your ready to serve, turn the oven back on to 375°.  Roast for another 30-40 minutes, then take the prime rib out of then oven. Take the prime rib out of the oven and let it rest about 10 minutes. Slice and serve.