Russian law limits a person to serve as president for two consecutive six-year terms.

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If Russian President Vladimir Putin, 67, takes a six-year break every 12 years and lives until at least 2054 when he is 102 years old, he can serve three more terms, or 18 more years, as president of Russia.

Putin was first elected as president in 2000 and was re-elected in 2004, 2012 and again in 2018. His current term ends in 2024 when he will have to take a six-year break that would end in 2030.

If the term limits do not change, Putin has the potential to serve a total of 33 years as Russia's president including the time he has already spent in office.

Assuming he is re-elected in 2030 and 2036, he can serve 12 more years until 2042. He would be 88 years old when that term ends. In 2048, when Putin is 94 years old, he is eligible to be re-elected. If he is elected in 2048 and 2054 he could serve until 2060 at which point he could be 102 years old.

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So far, Putin has served a total of 15 years, including a year-long acting term, two four-year terms and two six-year terms, in the country's highest office. He has been in power longer than any other Russian or Soviet leader since Josef Stalin, who led from 1924 until his death in 1953.

In 1999, Putin served as acting president for a year after former Russian President Boris Yeltsin unexpectedly resigned after eight years in office. Putin won the next election in 2000 with 53 percent support from the country's popular voting system.

Putin served his first official four-year term as president from 2000 to 2004 and again from 2004 to 2008. Under Russian law, nobody can serve three consecutive terms as president, so from 2008 to 2012, Putin served as premier, during which time Dmitry Medvedev, a longtime ally of Putin, served as president and extended the presidential term to six years.

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In January, Putin unexpectedly reshuffled his inner circle, including the appointment of a new prime minister, and announced a constitutional reform that indicated he was working to carve out a new governing position for himself after his six-year term ends in 2024. It remains unclear what specific path he will take to stay in charge.

A Russian government commission is several constitutional changes, including giving Putin the title of "Supreme Ruler" of Russia, according to a Reuters report.

If Putin decides he would rather retire in his old age, he can still receive 75 percent of the monthly salary for the president of Russia.

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The Associated Press contributed to this report.