# Mersenne News

**New Prime - M77,232,917**

On December 26th of 2017 the 50th known Mersenne Prime was found by GIMPS. It was the largest known prime number at the time of discovery.

**New Prime - M74,207,281**

On January 7th of 2016 the 49th known Mersenne Prime was found by GIMPS. It was the largest known prime number at the time of discovery.

**New Prime - M57,885,161**

On January 25th of 2013 the 48th known Mersenne Prime was found by GIMPS. It was the largest known prime number at the time of discovery.