So they found a new Mersenne Prime. Mersenne Primes have the form (2^n) − 1. For the newest prime, n = over 74 million (!). That is an astronomically large number–actually, that’s not right. It’s an unimaginably large, universe-busting number.
Of interesting note is that it would have been utterly impossible to find this number without computers, the internet, and a ton of people. It was basically an enormous, crowd-sourced, brute-force method of discovery. Given how far beyond the previous prime this number was, we may never find another in our lifetimes unless some super-spooky algorithm is discovered.
Then again, the magnitude of the primes does not grow in any predictable way. The next one might not be too many thousands of powers of 2 beyond this one!
How cool is that?