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New Testament manuscripts written on papyri are assigned a number by the Institute for New Testament Textual Research in Germany (P = papyri + no. 52)
A scientist (Ira Rabin) and a biblical scholar (Nehemia Gordon) were allowed to study Codex Vaticanus in person and use micro X-ray fluorescence (µXRF) and ultraviolet-visible-near-infrared (UV-vis-NIR) reflectography to determine the chemical composition of the different inks 
The papyrus was published on Aug 31, 2023, in volume 87 of the Oxyrhynchus Papyri (pp. 6-14) as no. 5575 and entitled "Sayings of Jesus"
https://twitter.com/nelson_hsieh7/status/1681699189296873472(1) First, some praise: I still like Wallace's grammar and no one should dismiss it as out-dated or completely wrong methodologically.

In 2015, I took Peter Gentry's Advanced Greek Grammar and we read Eugene Goetchius's grammar (1965), the first NT grammar to use modern linguistic analysis