The centipede is the third smallest known 31c/240 spaceship after the caterloopillar's 31c/240 variant, and remained the smallest 31c/240 spaceship making use of the 31c/240 reaction (and therefore the smallest period 240 31c/240 spaceship) until the development of the silverfish. It was created by Chris Cain later on the same day as the shield bug[1] and actually reuses most of its circuitry despite of having quite different shape. Its smaller size is due to a more compact front-end that was built by Cain a day earlier.

Pattern type Spaceship
Number of cells 620901
Bounding box 11652×126714
Direction Orthogonal
Period 240
Mod 240
Speed 31c/240
Speed (unsimplified) 31c/240
Heat 402634.1
Discovered by Chris Cain
Year of discovery 2014

The centipede ranked second place in the Pattern of the Year 2014 competition in a belated vote held in 2018 on the ConwayLife.com forums, behind the waterbear.[2]


  1. Chris Cain (September 4, 2014). "Re: 31c/240 caterpillar working notes". Retrieved on September 5, 2014.
  2. 77topaz (March 7, 2018). Re: Belated Pattern of the Year 2014 competition: Voting (discussion thread) at the ConwayLife.com forums

See also

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