What are the earliest known surviving manuscript?

Firstly, it needs to be understood that there are no surviving original manuscripts of the New Testament.

The earliest surviving manuscripts of the Old Testament date to the 10th Century AD.

There are 5,686 manuscripts of the New Testament in existence. Manuscript fragment p52, also known as the John Rylands fragment which contains John 18:31-33, 37-38, is dated around 125 AD, although some scholars date it as early as 110 AD. Many other manuscript fragments date from late in the second century although some scholars date them somewhat earlier.

The Codex Vaticanus is the earliest known complete manuscript to have survived being dated to around 325-350 AD.