That looks like the date it was compiled and some arbitrary numbers.... Calm down boomer.
Just because I am cautious about downloading a random numbered file (even if it is the date it was compiled and some arbitrary numbers) you as an immense favor to the publisher go out of your way to attempt to insult me by calling me a boomer? That term fits my mother, I am by no means a septuagenarian (look it up) or octogenarian while you clearly are an ageist (it's a real word) who should be ashamed of yourself.