The Srimad Devi Bhagavatam, also known as Devi Purana, was composed into 12 chapters, containing 18000 verses by the great Veda Vyasa. Though classified as an upapurana it is the only purana Vedavyasa called "Maha Purana" meaning the great purana. At the end of each chapter of the 18 main puranas or the upa puranas is the verse "This is the end of the fifth section of the Vishnu Purana", or "Thus ends the first chapter of Ganesha Purana Upasanakhanda called "The Description of Somakanta". Where as in the Devi Bhagavatam it is clearly - "Thus ends the eighth chapter of the first Skandha in the Mahapurâna Srimad Devî Bhâgavatam of 18,000 verses by Maharsi Vedavyâsa". The choice of words by the great rishis is obvious as Divine Mother is described in all major sastras as the one beyond and above the trinities and all Gods.