Jason's p11

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Jason's p11
#N Jason's p11 #C A period 11 oscillator. #C http://www.conwaylife.com/wiki/Jason%27s_p11 x = 25, y = 25, rule = B3/S23 8bob2ob2obo$8b2obobob2o2$8b3o3b3o$7bo3bobo3bo$7bobobobobobo$11bobo$4b 2o2b3o3b3o2b2o$2obo3bo9bo3bob2o$bobobobo9bobobobo$o2bo3bo9bo3bo2bo$2o 2b3o11b3o2b2o2$2o2b3o11b3o2b2o$o2bo3bo9bo3bo2bo$bobobobo9bobobobo$2obo 3bo9bo3bob2o$4b2o2b3o3b3o2b2o$11bobo$7bobobobobobo$7bo3bobo3bo$8b3o3b 3o2$8b2obobob2o$8bob2ob2obo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 4 THUMBSIZE 2 LOOP 11 WIDTH 480 HEIGHT 480 ]]
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Pattern type Oscillator
Number of cells 144
Bounding box 25 × 25
Period 11 (mod: 11)
Heat 33.5
Volatility 0.62 | 0.62
Kinetic symmetry *c
Discovered by Jason Summers
Year of discovery 2003

Jason's p11 is a period-11 oscillator discovered by Jason Summers in April, 2003.[1] The first known version is stabilized by snakes; alternate stabilizations are possible, using e.g. bookends. The variant with the minimum population uses one centered house on each side, reducing the population from 144 to 132.[2]

The version stabilized by multiple houses first appeared semi-naturally in March 2016, in a symmetric soup submitted to Catagolue.[3]

x = 25, y = 25, rule = B3/S23 10b2ob2o$10bo3bo$11b3o$8b3o3b3o$7bo3bobo3bo$8b2obobob2o$9bobobobo$4bo 3bo2bobo2bo3bo$3bobobob2o3b2obobobo$3bob2obo7bob2obo$2obo4bo3bo3bo4bob 2o$obob4o3bobo3b4obobo$2bo7bo3bo7bo$obob4o3bobo3b4obobo$2obo4bo3bo3bo 4bob2o$3bob2obo7bob2obo$3bobobob2o3b2obobobo$4bo3bo2bobo2bo3bo$9bobobo bo$8b2obobob2o$7bo3bobo3bo$8b3o3b3o$11b3o$10bo3bo$10b2ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 12 ]]
A simple predecessor of the smallest version of Jason's p11.
(click above to open LifeViewer)
Catagolue: here

On July 12, 2025, PK22 found a 36-glider synthesis of a stator variant.[4] Jormungant reduced this to a 32-glider synthesis.

On October 30, 2025, PK22 found a 92-glider synthesis of the canonical version, which Chris857 quickly improved to 84 gliders.[5][6] KtT further lowered the cost to 76 gliders.[7][8] On August 16, 2026, PK22 lowered the cost to 74 gliders.[9][10]

References

  1. ↑ Jason Summers' all-osc pattern collection. Retrieved on July 21, 2011.
  2. ↑ Scorbie (January 12, 2015). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  3. ↑ praosylen (March 31, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  4. ↑ PK22 (July 12, 2025). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  5. ↑ Chris857 (October 30, 2025). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  6. ↑ shinjuku (#11915467252) (October 30, 2025). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  7. ↑ Chris857 (October 31, 2025). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  8. ↑ shinjuku (#11918669014) (October 31, 2025). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  9. ↑ PK22 (August 16, 2026). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  10. ↑ shinjuku (#15923755464) (August 16, 2026). Job triggered by Adam P. Goucher at GitLab Catagolue project.


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