Isaac Newton's End of the World Predictions?

Did the famous 18th century scientist, known as Sir Isaac Newton, predict the end of the world in the 21st century? Why may the world end earlier than he wrote? Could his 2060 date be wrong? Did he have errors related to the revived Roman Empire? Did he assert that some type of cross was the 'mark of the beast' like the Cathari had? Did he seem to tie trinitarianism with that mark as well as being part of an "infernal false religion'? What did he teach about who would flee? …