p55 pre-pulsar hassler

From LifeWiki
(Redirected from Pre-pulsar hassler 55)
Jump to navigation Jump to search
p55 pre-pulsar hassler
x = 43, y = 25, rule = B3/S23 8bo25bo$7bobo23bobo$8bo25bo$13bo15bo$6b5o2b3o11b3o2b5o$5bo4bo5bo9bo5bo 4bo$4bo2bo7b2o9b2o7bo2bo$bo2bob2o27b2obo2bo$obobo5bo21bo5bobobo$bo2bo 4bobo19bobo4bo2bo$4b2o2bo2bo6bo5bo6bo2bo2b2o$9b2o6b3o3b3o6b2o3$7b2o25b 2o$7bo2bo21bo2bo$8b3o21b3o2$4b2obob2o21b2obob2o$4bob2obo23bob2obo$9bo 23bo$9b2o3b2o11b2o3b2o$15bo11bo$12b3o13b3o$12bo17bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 11 ZOOM 10 LOOP 55 ]]
Pattern type Oscillator
Number of cells 136
Bounding box 43×25
Period 55
Mod 55
Heat 25.82
Volatility 0.70
Strict volatility 0.70
Discovered by David Buckingham
Year of discovery 1986

p55 pre-pulsar hassler is a period-55 oscillator discovered by David Buckingham on January 26, 1986[1], being the first period-55 oscillator to be found. It works by hassling a pre-pulsar with various still-lifes. The original pattern is hassled by two eater 1s, four eater 3s, and two 14-cell still lifes, each composed of an eater 1 and a bun. A reduced set of still-lifes were discovered by Matthias Merzenich in June, 2011. The new version is hassled by four eater 1s, two eater 3s, and two BTSs. On December 8, 2021, iNoMed found a slight reduction to this version.[2]

On December 9, 2021, iNoMed posted a 124-glider synthesis of the 136-cell hassler.[3]

A smaller version in both population and bounding box (shown below) was found by iNoMed on June 17, 2022. However, it uses p5 supports instead of exclusively stable supports.

x = 37, y = 22, rule = B3/S23 10bo15bo$6bo3b3o11b3o3bo$5bobo5bo9bo5bobo$5bobo4b2o9b2o4bobo$3b3ob2o 19b2ob3o$2bo31bo$3b3ob2o19b2ob3o$5bob2o6bo5bo6b2obo$14b3o3b3o$2bo31bo$ bobo29bobo$2bo31bo$5b2o23b2o$6bo23bo$2b2o3bo21bo3b2o$2bo4bo21bo4bo$3bo 4bo19bo4bo$3b2ob2o21b2ob2o$2b2o7b2o11b2o7b2o$bo10bo11bo10bo$obo6b3o13b 3o6bobo$2o2b3o2bo17bo2b3o2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 28 THUMBSIZE 2 ]]
(click above to open LifeViewer)
RLE: here Plaintext: here


Generation 4 of the originally found pattern reveals that the object being hassled is a pre-pulsar.

See also


  1. Dean Hickerson's oscillator stamp collection.
  2. iNoMed (December 8, 2021). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
  3. iNoMed (December 9, 2021). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums

External links

  • 174P55.1 at Heinrich Koenig's Game of Life Object Catalogs