RATIONAL NUMBER- a number that can be written as a quotient of two integers, where the divisor is not 0. Examples are ½, 0.3, -6, 3 ½ and any repeating decimal(shown with a bar over the digits).
A new prime number, thought to be the largest ever identified, has been discovered by a professor at the university of Central Missouri. Curtis Cooper used a giant computer network to do the work to find the 17-million digit number - which is a number divisible only by itself and by one.
