Coe's p8

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Coe's p8
2o10b$2o2b2o6b$5b2o5b$4bo2bo4b$7bo2b2o$5bobo2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 4 THUMBSIZE 2 ]]
Pattern type Oscillator
Number of cells 17
Bounding box 12×8
Frequency class 32.1
Period 8
Mod 4
Heat 12.5
Volatility 0.90
Strict volatility 0.90
Discovered by Tim Coe
Year of discovery 1997

Coe's p8 is a period-8 oscillator that was found by Tim Coe on August 19, 1997.[1] In terms of its 17 cells, it is tied with smiley as third-smallest known period-8 oscillator. It consists of two blocks hassling an unnamed object, similar to blocker. The unnamed object is a beehive predecessor that looks like two linked gliders. The spark created by the block eating can support the bumper, but the blocker would be smaller for that purpose.


Coe's p8 is about the forty-seventh most common naturally-occurring oscillator in Achim Flammenkamp's census.[2] On Catagolue, it is the third most common period 8 oscillator, being less common than the blocker but more common than smiley.[3]

The first natural Coe's p8 stator variant, Coe's p8 on table, occurred in June 2020.[4]

Glider synthesis

In August, 2004 Mark Niemiec found a 16-glider synthesis of this oscillator.[5] In October, 2010 Martin Grant and Matthias Merzenich found an 8-glider synthesis, based on a predecessor discovered by Lewis Patterson.[6] The best synthesis known as of July 2017 uses 5 gliders and was found by gmc_nxtman and Mark Niemiec on July 8, 2017.[7]

See also


  1. Jason Summers' all-osc pattern collection.
  2. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  3. Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
  4. Ian07 (June 10, 2020). Re: Soup search results (discussion thread) at the forums
  5. Jason Summers' jslife pattern collection.
  6. Matthias Merzenich (October 2, 2010). Re: Thread For Your Accidental Discoveries (discussion thread) at the forums
  7. Mark Niemiec (March 3, 2019). Re: Thread for your unsure discoveries (discussion thread) at the forums

External links

  • 17P8.2 at Heinrich Koenig's Game of Life Object Catalogs