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This is a list of Indian Prime Ministers by longevity. Where the person in question is still living, the longevity is calculated up to 14 March 2017.
Two measures of the longevity are given - this is to allow for the differing number of leap days occurring within the life of each Prime Minister. The first column is the number of days between date of birth and date of death, allowing for leap days; the second column breaks this number down into years and days, with the years being the number of whole years the Prime Minister lived, and the days being the remaining number of days after his/her last birthday.
If a Prime Minister served more than one non-consecutive term, the dates listed below are for the beginning of their first term, and the end of their final term.
The median age at which a Prime Minister first takes office is roughly 64 years and 8 months, which falls between Gulzarilal Nanda and Chandra Shekhar. The youngest person to become Prime Minister was Rajiv Gandhi, who became Prime Minister at the age of 40 years, 72 days. The oldest person to become Prime Minister was Morarji Desai, who became Prime Minister at the age of 81 years, 23 days.
The oldest living Prime Minister is Atal Bihari Vajpayee, born 25 December 1924 (aged 7009291012480000000♠92 years, 79 days). The youngest living Prime Minister is the incumbent Narendra Modi, born 17 September 1950 (aged 7009209818080000000♠66 years, 178 days).
The longest lived Prime Minister was Gulzarilal Nanda, who lived to the age of 99 years, 195 days. Morarji Desai was the second-longest lived Prime Minister, and the longest lived elected Prime Minister (Nanda, a cabinet minister, served as acting Prime Minister when both Jawaharlal Nehru and Lal Bahadur Shastri died in office). Desai lived to the age of 99 years, 40 days, only 155 days short of matching Nanda. The shortest lived Prime Minister was Rajiv Gandhi, who was assassinated at the age of 46 years, 274 days.
Narendra Modi (17 September 1950) is the first Prime Minister of India to be born after the Independence of India. All other former Prime Ministers were born before the Independence of India. Before him, Rajiv Gandhi was the last born Prime Minister (20 August 1944), but he was assassinated in 1991.