She was not only the first woman to become Prime Minister; she was also the longest serving Prime Minister of the United Kingdom in the 20th century. (rickstrankman.ca)
Adam Lang was Britain's longest serving prime minister of the last half century. (bookbrowse.com)
Malaysia's longest - serving prime minister withdrew his support for Najib after the Barisan Nasional coalition fell short of a majority in 2013 elections. (breakingviews.com)