522 (Crum), is a papyrus codex with a collection of early Christian Gnostic texts in Coptic (sub-Akhmimic dialect).
[1] The manuscript was written on papyrus in the form of a codex.
[2] It was later identified as a manuscript of the Gospel of Thomas (tractate 5).
[3] It was examined by Frederic G. Kenyon and Walter Ewing Crum in 1905.
According to Crum the dialect is a mixture of Akhmimic and Sahidic forms.