What are counted when measuring telescope productivity? How many occurrences of #1 have there been for the Very Large Telescope? How many occurrences of #1 have there been for the Hubble Telescope? Is #2 greater than #3?
Very Large Telescope
Is the Very Large Telescope the most productive telescope in the world?
Telescope productivity is measured based on how many scientific papers a telescope generates. The Hubble Space Telescope is the most productive telescope in the world. 
telescope in the Atacama Desert, Chile