Railway Minister Ashwini Vaishnav on Thursday said more than 16,000 trains were operated for the Mahakumbh that carried around five crore devotees to the pilgrimage. Mahakumbh which takes place once in 12 years, began on January 13 (Paush Purnima) and concluded after 45 days on February 26 in Prayagraj. The mega religious event drew a record over 66 crore pilgrims.