PrimeGrid

The first known GFN-21 prime has been discovered. More details will be released in the coming days. This is a 13 million digit prime that will enter the Top 5000 prime list as the 6th largest known prime. With this discovery, our GFN-22 project has been restarted at b=400K. These numbers are 23 million digits in length.

We've reset everyone's default venue to the blank or "---" venue. If you use the default venue to assign a venue to newly created hosts, for example hosts created on a cloud service, you will need to reassign this value. We apologize for the inconvenience.