Ben Delo joined the project and has been running several hundred AWS cores.[1]

Slightly related a new method to validate the result was found which means that they no longer need to run a 2nd double check run to validate that there wasn't floating point rounding errors[2]. Interestingly this credits a HN thread as the source of inspiration[3].

[1] https://www.mersenneforum.org/showthread.php?t=24819&highlig... [2] https://mersenneforum.org/showthread.php?p=546560 [3] https://news.ycombinator.com/item?id=20587753