Period-156 glider gun

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Period-156 glider gun
x = 42, y = 42, rule = B3/S23 20b2o$20b2o$6b2o$5b2o$7bo$3bo$2b2o18b2o$2bobo17bo$22bo$23bo9$32bo2bo$ 33b3o$2o38b2o$2o38b2o$6b3o$6bo2bo9$18bo$19bo$19bo17bobo$18b2o18b2o$38b o$34bo$35b2o$34b2o$20b2o$20b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 HEIGHT 480 LOOP 156 ]]
Pattern type Gun
Number of cells 36
Bounding box 42×42
Period 156
Barrels 8
Discovered by Jason Summers
Year of discovery 2004

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.

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]

x = 74, y = 80, rule = B3/S23 66bobo$66b2o$67bo14$39bo11bobo$39bobo9b2o$39b2o11bo3$54b3o$54bo$55bo7$ 51bo$49b2o$50b2o4$23bo$24bo$22b3o46b3o$bo69bo$2bo69bo$3o46b3o$49bo$50b o4$22b2o$23b2o$22bo7$18bo$19bo$17b3o3$21bo11b2o$21b2o9bobo$20bobo11bo 14$6bo$6b2o$5bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
14-glider synthesis of period-156 glider gun
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RLE: here Plaintext: here

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

External links