3000 = I love you 3000 from End Game
19 = covid
Updated.
Based on this meme:
https://piefed.zip/c/programmer_humor@programming.dev/p/1936672/hard-times-indeed
42 is from the hitchhikers guide to the galaxy and is the meaning of life. Problem is no one knows what question to ask to get the answer. Anyway nerds in the know laugh at this number.
No idea about 47 unless they're talking the agent from the hitman games?