Largest known prime number

A new prime number has been discovered. It is the largest prime number ever discovered. Want to memorize it? It only has 17,425,170 digits. ­čÖé If you really want to know the number, it is 2 multiplied by itself 57,885,161 times, minus 1. It was discovered by mathematicians in the United States. The previous largest prime number was discovered in 2008 and had about 13 million digits. Prime numbers are whole numbers greater than one that are divisible only by 1 and themselves. Examples are 2, 3, 5, 7, 11, and 13. There is always going to be a larger prime number than the one discovered since there are an infinite number of prime numbers.
Here is a prime number rap.