A factoid was originally defined to mean a false statement presented as a fact. In colloquial speech, it is often used to mean a true but brief or trivial item of news or information.
A common factoid is the incorrect claim that the Great Wall of China is visible from space with the naked eye.
The Great Wall of China is a series of fortifications in China. They were built across the historical northern borders of ancient Chinese states and Imperial China as protection against various nomadi
Factoid
…A common factoid is the incorrect claim that the Great Wall of China is visible from space with the naked eye. A factoid was originally defined to mean a false statement presented as a fact. In colloquial speech, it is…
The Ming dynasty Great Wall at Jinshanling
Part of the Great Wall of China (April 1853, X, p. 41)
Great Wall of Han dynasty near Yumenguan