The statistics of Mahdavi ‘Aḥādīth [Narrations about Imam Mahdi (mgehr)]
The number of Shia and Sunni sources that were studied in the book Muntakhab al-‘Athar, is 157 books and 6036 narrations.
In the book Mu‘jam al-mawḍū‘ī li-aḥādīth al-Imām al-Mahdī (mgehr), we can find out that its authors narrated 1941 narrations without repeating!