Largest known Kynea prime

The largest known is equal to (2661,478 + 1)2 − 2, which is 398,250 digits long; it has been discovered on June 18, 2016.The Prime Database: (2^661478+1)^2-2
== Sources ==
Category:Numbers
Category:Class 2
Category:Numbers with 1000 to 1000000 digits
Category:Numerical records
Category:Prime numbers
Category:Dynamic googolisms