616 or 666?

Papyrus 115 is the oldest known copy of the New testament. in it, Revelation 13:18 shows the number of the beast is 616 and not the usual 666 we see today.

This comes as a huge shock to most people. Was it once 616 and some mysterious force has manipulated it down the centuries to become 666? That narrative would certainly fit with the Mandela Effect conspiracy theorists, who would say the people of the time misremembered it and it's then been passed on as an MMDE.

The Novum Testamentum Graece has it as three words, "hexakosioi hexekonta hex", meaning "six hundred sixty-six":

And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name. Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.

New Testament

There's even an 11th century manuscript which gives the number as 665.

Wikipedia has the full papyrus details. 

Transcription error?

One explaination is a human error, as explained here.