https://ntweblog.blogspot.com/2005/04/number-of-beast-616-and-oxyrhynchus.html
On Ralph the Sacred River, Ed Cook draws attention to the National Geographic article on the Oxyrhynchus Papyri also discussed in Paleojudaica (and I really share their annoyance at Revelations). The National Geographic article writes:
The latest volume includes details of fragments showing third- and fourth-century versions of the Book of Revelations. Intriguingly, the number assigned to “the Beast” of Revelations isn't the usual 666, but 616.