CPI(M)) is the largest communist party in India. The party emerged from a split from the Communist Party of India in 1964. The CPI(M) was formed at the Seventh Congress of the Communist Party of India held in Calcutta from 31 October to 7 November 1964. As of 2018, CPI(M) is leading the state government in Kerala. It also leads the West Bengal Left Front. As of 2016, CPI(M) claimed to have 1,048,678 members. The highest body of the party is the Politburo.