On 16 November 2020, 23:17:01 UTC, PrimeGridâ€™s The Riesel Problem project eliminated k=146561 by finding the mega prime:
The prime is 3,395,865 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 42nd overall. This is PrimeGrid's 16th elimination. 48 k's now remain.
The discovery was made by Pavel Atnashev (Pavel Atnashev) of Russia using an Intel(R) Xeon(TM) E5-2680 v4 CPU @ 2.40GHz with 4GB RAM, running Linux. This computer took about 3 hours, 18 minutes to complete the primality test using LLR2. Pavel Atnashev is a member of the Ural Federal University team.
For more details, please see the official announcement.