OrphanWilde comments on Hypothetical situations are not meant to exist - Less Wrong Discussion
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The minimum energy required is ~1,000*(Your mass in kilograms + the mass in kilograms of everything coming with you) petajoules, assuming you want to get to 1983 in about three months of subjective time, with a gross of assumptions about the way time works. A minimum of 200 joules per kilogram will get you a subjective arrival time of 1.2 million years. [ETA: Forgot about deceleration. 400 joules for the 1.2 million year mark.]