Largest known safe prime

The largest known is equal to 2,618,163,402,417 × 21,290,001 - 1UTM, Primes (accessed 2020-11-19); it has been discovered in October 2016. It is 388,342 digits long, and associated to the largest known Sophie-Germain prime.
==Sources==
==See also==
*Largest known twin primes
Category:Numbers
Category:Class 2
Category:Numbers with 1000 to 1000000 digits
Category:Numerical records
Category:Prime numbers
Category:Dynamic googolisms