A quite long prime
Mathematicians at UCLA have verified now the largest known prime number, 13 million digits long! It's a Mersenne prime , in the form 2 p − 1. This new prime is 2 43,112,609 − 1. (And no, you can't put it in your calculator and get an answer... ) Read the news story This kind of prime hunting requires a network of computers running together to do the massive amounts of calculations.