31P8H4V0

31P8H4V0 is the smallest known period 8 c/2 orthogonal spaceship and a would-be block puffer made of a middleweight spaceship and another xWSS whose output is cancelled by its own spark. It was found by Jason Summers on October 29, 2002.[1]

31P8H4V0
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Pattern type Spaceship
Number of cells 31
Bounding box 11×11
Direction Orthogonal
Period 8
Mod 8
Speed c/2
Speed (unsimplified) 4c/8
Heat 42.5
Discovered by Jason Summers
Year of discovery 2002

A partial glider synthesis for this spaceship was posted by Goldtiger997 on April 9, 2020, with the final step and most of the base still life construction completed.[2] The synthesis was completed with 189 gliders the next day.[3] Several minor improvements, reducing the synthesis to 182 gliders, were posted by Mark Niemiec on June 6.[4] On August 3, Blinkerspawn and Tanner Jacobi found a 37-glider synthesis using a different base.[5]

References
  1. Jason Summers' jslife pattern collection. Retrieved on March 17, 2020.
  2. Goldtiger997 (April 9, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  3. Goldtiger997 (April 10, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  4. Mark Niemiec (June 6, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  5. BlinkerSpawn (August 3, 2020). Re: Small Spaceship Syntheses (discussion thread) at the ConwayLife.com forums
  • 31P8H4V0.1 at Heinrich Koenig's Game of Life Object Catalogs
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