Period-156 glider gun

Period-156 glider gun is a glider gun with 8 barrels. The oscillator Jason's p156 is basically this gun with all glider streams blocked. In terms of its 36 cells it is the same size as the Gosper glider gun, but the Simkin glider gun is still smaller at 29 cells. It is capable of pulling beacons.

Period-156 glider gun
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Pattern type Gun
Number of cells 36
Bounding box 42×42
Period 156
Barrels 8
Discovered by Jason Summers
Year of discovery 2004

The gun first appeared semi-naturally in January 2015 in a soup found by Dongook Lee using apgsearch,[1] making it the first semi-natural gun.[2] A 16-glider synthesis was discovered for this gun by Goldtiger997 on June 2, 2019,[3] which was improved to 14 gliders the next day by Oscar Cunningham.[4]

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14-glider synthesis of period-156 glider gun
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A suppressed form of the gun appeared semi-naturally on September 22, 2018, in a soup submitted by carybe, forming a period-312 oscillator, the highest-period oscillator to have occurred semi-naturally.[5]

References
  1. Dongook Lee (January 9, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  2. Dongook Lee (January 9, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  3. Goldtiger997 (June 2, 2019). Re: Thread for basic questions (discussion thread) at the ConwayLife.com forums
  4. Oscar Cunningham (June 3, 2019). Re: Thread for basic questions (discussion thread) at the ConwayLife.com forums
  5. Ian07 (September 22, 2018). Re: Soup search results (discussion thread) at the ConwayLife.com forums
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