Largest known Sophie Germain prime

The largest known is equal to 2,618,163,402,417 × 21,290,000 − 1, which is 388,342 digits long; it has been discovered in February 2016.https://t5k.org/top20/page.php?id=2
The decimal expansion of that prime can be shown here.
== Top 10 largest known Sophie Germain primes ==
Rank	Prime 	Digits 	Year discovered
1 	2,618,163,402,417 × 21,290,000 − 1	388,342	2016
2 	18,543,637,900,515 × 2666,667 − 1 	200,701	2012
==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