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LongLife (also Long Life) is a Life-like cellular automaton in which cells survive from one generation to the next if they have 5 neighbours, and are born if they have 3, 4, or 5 neighbours. The rule has been studied by Andrew Trevorrow.
LongLife is characterized by abundant natural high-period oscillators, composed of alternating rows, that appear to be unable to escape their bounding diamond. There are no known spaceships in LongLife, but the rule is on David Eppstein's "most-wanted" list.
- David Eppstein. "Most Wanted". Which "Life"-Like Systems Have Gliders?. Retrieved on 2016-09-29.