How many years after the first Russian explorers visited Alaska did Alaska become a U.S state?

Russian explorers first visited Alaska in the mid-18th century, with significant exploration occurring around 1741. Alaska was ceded to the United States in 1867 and officially became a U.S. state on January 3, 1959. Therefore, it was approximately 218 years after the first Russian visits that Alaska became a U.S. state.