Narendra Modi has yet another milestone to his credit - becoming the longest serving non-Congress Prime Minister of India.

Atal Bihari Vajpayee, who held that distinction so far had three runs at India's top post - first for 13 days from May 16, 1996 till May 28, 1996, followed by his 408 day second tenure from March 19, 1998 till April 17, 1999 and finally his third tenure of 1,847 days from October 13, 1999 till May 22, 2004 bringing the total to 2,268 days