Its called a timestamp : A timestamp is a sequence of characters or encoded information identifying when a certain event occurred, usually giving date and time of day, sometimes accurate to a small fraction of a second. The term derives from rubber stamps used in offices to stamp the current date, and sometimes time, in ink on paper documents, to record when the document was received. Common examples of this type of timestamp are a postmark on a letter or the "in" and "out" times on a time card.Anyone knows how this plugin generate that unknown time format into the column called " At " ?
Or how could I convert the following into readable time format, please? 15425673071103445
and you can convert it to normal date time using a converter like : https://www.unixtimestamp.com/index.php