Prime rib is a luxurious and flavorful cut of beef that is perfect for special occasions. It is typically roasted in the oven and cooked to an internal temperature of 135 degrees Fahrenheit for medium-rare, 140 degrees Fahrenheit for medium, or 145 degrees Fahrenheit for medium-well.
The cooking time for prime rib will vary depending on the size and thickness of the roast. A general rule of thumb is to cook the roast for 15 minutes per pound for the first 4 pounds, and then 10 minutes per pound for each additional pound. So, for example, a 5-pound roast would cook for 75 minutes (15 minutes per pound for the first 4 pounds, and 10 minutes per pound for the remaining 1 pound).