Post counting thread.

In 856 CE three earthquakes occurring in Greece, Tunisia, and Iran killed around 290,000 people.

in 857 ce, fact checkers at snopes.precom found that the actual number of dead humans was closer to 289,500 and then all of them were promptly fired by trump's great great great great great great great great great great great great great great great great great great great great great great great great grandfather

858 = 33x26

859 another bloody prime

but also the year that the world's oldest university was founded.
The University of Al Karaouine in Morocco.

Nandlstadt in Bavaria is said to be the oldest hop-growing area in the world, having grown them since the year 860.

861 Aïda /ɑːˈiːdə/ is a carbonaceous asteroid from the outer region of the asteroid belt.

8 = 6 + 2

863: First mentioning of Smolensk in a document that has survived until today.

864 is a descending sequence of even numbers.

865 is the product of two prime numbers.

The 866 Protection Visa allows individuals already in Australia to seek asylum and remain in the country lawfully. If granted, it lets you live, work, and study in Australia and provides a pathway to permanent residency.

@Kewpie said
The 866 Protection Visa allows individuals already in Australia to seek asylum and remain in the country lawfully. If granted, it lets you live, work, and study in Australia and provides a pathway to permanent residency.

868 is a palindrome.

@Kewpie said
868 is a palindrome.

@Great-Big-Stees said
869: the Sanriku earthquake occurred.