This was originally recited by Lord Brahma to the Rishi Marichi and contains thirteen thousand shlokas.
This has fifty thousand shlokas and it is named after the lotus flower(Padma) on which Lord Brahma Deva(Creator god) appeared from the navel of Lord Vishnu.
This was first recited by the sage Maitreya and has twenty-three thousand shlokas. Moreover, the importance of the worship of Lord Vishnu is explained in the 22 chapters of this particular Purana as the path for moksha.
This Purana has twenty-four thousand shlokas and was first recited by Lord Vayu Deva(wind god).
This Purana contains eighteen thousand shlokas and is a devoted text for all the Vaishnavas who are devotees of Lord Vishnu.
This Purana was first recited by the fire god Lord Shri Agni Deva to the Maharishi Vasishtha. It contains sixteen thousand shlokas and people should recite it in the month of Margashirsha.