186P24

186P24 is an unnamed period-24 oscillator that was discovered by Bill Gosper on October 21, 1994.[1] It was the first non-trivial period 24 oscillator to be found,[note 1] although its original form used t-nosed p4s instead of monograms.

186P24
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html> #O Bill Gosper, October 21, 1994 #C The first non-trivial period 24 oscillator to be found. x = 58, y = 26, rule = B3/S23 22bo10bo24b$21bobo8bobo23b$22bo10bo24b2$3ob3o12bo5bo4bo5bo12b3ob3o2b$ 3bo6bo3bo4bo5bo4bo5bo4bo3bo6bo5b$2o3b2o3bob3o3bo7bo2bo7bo3b3obo3b2o3b 2o2b$3bo6bo3bo4bo5bo4bo5bo4bo3bo6bo5b$3ob3o12bo5bo4bo5bo12b3ob3o2b2$ 22bo35b$20b3o9b3o23b$19bo7b3o7b2o19b$19b2o7b3o7bo19b$23b3o9b3o20b$35bo 22b2$2b3ob3o12bo5bo4bo5bo12b3ob3o$5bo6bo3bo4bo5bo4bo5bo4bo3bo6bo3b$2b 2o3b2o3bob3o3bo7bo2bo7bo3b3obo3b2o3b2o$5bo6bo3bo4bo5bo4bo5bo4bo3bo6bo 3b$2b3ob3o12bo5bo4bo5bo12b3ob3o2$24bo10bo22b$23bobo8bobo21b$24bo10bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ GPS 12 THUMBSIZE 2 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type Oscillator
Number of cells 186
Bounding box 58×26
Period 24
Mod 24
Heat 159.2
Volatility 0.89
Strict volatility 0.02
Discovered by Bill Gosper
Year of discovery 1994

It uses two slightly modified carnival shuttles to make a toad flip its orientation every 12 generations.

See also

Notes
  1. A period-24 oscillator, boring p24, can be constructed from two sparkers (pulsar and figure eight) both of which were known by 1970. However, this type of oscillator is generally considered "boring", and thus not counted despite technically being non-trivial.

References
  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  • 186P24.1 at Heinrich Koenig's Game of Life Object Catalogs
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