There's a site for large prime numbers, and I wondered Mersenne primes have been the largest primes known - since 1992, and since 1952 with an exception for 198

There's a site for large prime numbers, and I wondered Mersenne primes have been the largest primes known - since 1992, and since 1952 with an exception for 1989 to 1992. GIMPS - https://www.mersenne.org https://www.mersenne.org - has topped the list since 1996. https://primes.utm.edu/notes/by_year.html#table2 https://primes.utm.edu/notes/by_year.html#table2