are you blind? the numbers are a guess.Where are people getting thousands of years from? Muhammad SAW. Counted 6 things. The death of Muhammad SAW, the plague, the conquest of baitul Maqdis, wealth will be in surplus (to the point 100 dinars is basically nothing), there will be a trial in every Arab household and the westerners would fight under 80 banners against the Muslims.
After the prophet (peace and blessings upon him) passed away the Muslims captured Jerusalem straight away. 2 signs in a few years. The plague was also spoken about but I can’t remember the exact year.