The Great Internet Mersenne Prime Search (GIMPS) has discovered the new largest known prime number, having 22,338,618 digits, on a university computer volunteered by Curtis Cooper for the project. The ...
Is 170,141,183,460,469,231,731,687,303,715,884,105,727 prime? Before you ask the Internet for an answer, can you consider how you might answer that question without a ...