Of the many texts designated 'Puranas' the most important are the Mahāpurāṇas or the major Puranas.[7] These are said to be eighteen in number, divided into three groups of six, though they are not always counted in the same way.
Reference 1: Verses number.
Reference 2: Agni, Bhagavata, Brahma, Brahmanda, Brahmavaivarta, Garuda, Kurma, Linga, Markandeya, Matsya, Narada, Padma, Shiva, Skanda, Vamana, Varaha, Vayu and Vishnu.
Source: http://en.wikipedia.org/wiki/Puranic
Reference 2: Agni, Bhagavata, Brahma, Brahmanda, Brahmavaivarta, Garuda, Kurma, Linga, Markandeya, Matsya, Narada, Padma, Shiva, Skanda, Vamana, Varaha, Vayu and Vishnu.
Source: http://en.wikipedia.org/wiki/Puranic
