Purana

Puranam is a genre of ancient Indian literature containing legends, myths, and traditional lore about cosmology, genealogies, and history. These texts are often written as dialogues and are known for their stories and symbolism. The 18 major Puranas, attributed to the sage Vyasa, are foundational texts in Hindu tradition that cover a vast range of topics, from the creation of the universe to specific religious duties and rituals.

https://vedabase.io/en/library/sb/12/13/4-9/

  1. The Brahma Purāṇa consists of ten thousand verses,
  2. the Padma Purāṇa of fifty-five thousand,
  3. Śrī Viṣṇu Purāṇa of twenty-three thousand,
  4. the Śiva Purāṇa of twenty-four thousand and
  5. Bhagavata Purana Śrīmad-Bhāgavatam of eighteen thousand.
  6. The Nārada Purāṇa has twenty-five thousand verses,
  7. the Mārkaṇḍeya Purāṇa nine thousand,
  8. the Agni Purāṇa fifteen thousand four hundred,
  9. the Bhaviṣya Purāṇa fourteen thousand five hundred,
  10. the Brahma-vaivarta Purāṇa eighteen thousand and
  11. the Liṅga Purāṇa eleven thousand.
  12. The Varāha Purāṇa contains twenty-four thousand verses,
  13. the Skanda Purāṇa eighty-one thousand one hundred,
  14. the Vāmana Purāṇa ten thousand,
  15. the Kūrma Purāṇa seventeen thousand,
  16. the Matsya Purāṇa fourteen thousand,
  17. Garuda Purana - the Garuḍa Purāṇa nineteen thousand and
  18. the Brahmāṇḍa Purāṇa twelve thousand.

Thus the total number of verses in all the Purāṇas is four hundred thousand. Eighteen thousand of these, once again, belong to the beautiful Bhāgavatam.