True period 22 gun

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True period 22 gun
True period 22 gun image
Pattern type Gun
Period 22
Barrels 1
Number of cells 86
Bounding box 45×21
Discovered by David Eppstein
Year of discovery 2000

True period 22 gun is a true period 22 gun discovered by David Eppstein on August 27, 2000. It uses two copies of the period 22 oscillator, 36P22, and was in fact found later on the same day as that oscillator.[1]


  1. "true". The Life Lexicon. Stephen Silver. Retrieved on July 7, 2009.