The largest known Wagstaff prime is equal to (2117,239 + 1) / 3, which is 35,282 digits long; it has been discovered on August 7, 2022.[1]
The largest known Wagstaff probable prime is equal to (215,135,397 + 1) / 3, which is 4,556,209 digits long; it has been discovered in June 2021.[2]