Sorry, 300 years.
"The population of Númenor chiefly consisted of Men of the surviving houses of the Edain, and they were known as the Númenóreans, or rather, Kings among Men. They had been increased in body and mind by Eönwë at the end of the War of Wrath, and granted a lifespan of an average 200 years, much increased from their ancestors' lifespan of 90 years. Those of the royal house descended from the first Half-elven king ,Elros Tar-Minyatur, however, were given a lifespan of more than 300 years."