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x = 38, y = 23, rule = B3/S23 9b2o4b2o7b2o$9bobo2bobo7b2o$11bo2bo$10bo4bo$10b2o2b2o$12b2o2$36b2o$2o 24bo6b2o2bo$o2b2o19b2obo5bob2o$b2obo19bo2bo4bo$5bo5b3o10b3o5bo$5bo4bo 2bo19bob2o$b2obo5bob2o19b2o2bo$o2b2o6bo24b2o$2o2$24b2o$22b2o2b2o$22bo 4bo$23bo2bo$12b2o7bobo2bobo$12b2o7b2o4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 5 ZOOM 10 LOOP 25 ]]
Pattern type Oscillator
Number of cells 98
Bounding box 38×23
Period 25
Mod 25
Heat 84.2
Volatility 0.87
Strict volatility 0.56
Discovered by Noam Elkies
Year of discovery 2002

98P25 is an unnamed period-25 oscillator discovered by Noam Elkies in October 2002. In terms of minimum population, it was the smallest known period-25 oscillator until the discovery of an improved version of the pattern.[1] The improved version, found by Matthias Merzenich on January 10, 2016, replaces the west and east fumaroles with eater 1s.[2]

It works by using four fumaroles and two blocks to hassle two honey farm predecessors.

x = 32, y = 23, rule = B3/S23 4b2o4b2o9b2o$4bobo2bobo9b2o$6bo2bo$5bo4bo$5b2o2b2o$7b2o21b2o$30bo$2o 26bobo$bo26b2o$bobo18b3o$2b2o16b2ob2o$9bo12bo$7b2ob2o16b2o$7b3o18bobo$ 2b2o26bo$bobo26b2o$bo$2o21b2o$21b2o2b2o$21bo4bo$22bo2bo$9b2o9bobo2bobo $9b2o9b2o4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 10 LOOP 25 Y 0 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 12 HEIGHT 320 ]]
A slightly smaller version (the current record), 88P25.
(click above to open LifeViewer)
RLE: here Plaintext: here

Half of this oscillator can be replaced by a toaster, as shown below.

Image gallery

A related period-25 oscillator that hassles only one honey farm predecessor
RLE: here
The original form of this oscillator used two copies of eater 1 rather than blocks.
RLE: here

See also


  1. "Class 2 Objects Catalog". Retrieved on April 18, 2009.
  2. Matthias Merzenich (January 10, 2016). Re: Oscillator Discoveries Thread (discussion thread) at the ConwayLife.com forums

External links