Well, it's been one million decacycles since The Ark launched. According to official sources, a decacycle is about 10 Earth days in Animated, a year in Beast Wars and 3 weeks in the IDW G1 comics. So in order that'd be either 2737 years, actually a million years or 57496 years. I'm gonna guess we're going with a million Earth years since Transformers are so long lived.