We like to do the numbers on Marketplace. and this week, a new number has arrived: M74207281
If you think that name sounds long, be warned: it is an extreme abbreviation. The largest known prime number, discovered this week by University of Central Missouri computer science professor Curtis Cooper, actually has more than 22 million digits.
When was the last time you talked about prime numbers? High School? Reminder: it’s when a number only has multiples of one and itself. Examples include two, five, seven, et cetera. The higher you get, the harder it is to find primes.