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16bo12bo16b$9b2o24b2o9b$8b3o3b2o14b2o3b3o8b$14b2ob2o8b2ob2o14b$16bo12b o16b4$2bo40bo2b$b2o40b2ob$b2o40b2ob4$2b2o38b2o2b$2b2o38b2o2b$o3bo36bo 3bo$3bo38bo3b$3bo38bo3b9$3bo38bo3b$3bo38bo3b$o3bo36bo3bo$2b2o38b2o2b$ 2b2o38b2o2b4$b2o40b2ob$b2o40b2ob$2bo40bo2b4$16bo12bo16b$14b2ob2o8b2ob 2o14b$8b3o3b2o14b2o3b3o8b$9b2o24b2o9b$16bo12bo! #C [[ THEME 6 GRID GRIDMAJOR 0 THUMBLAUNCH AUTOSTART ]] #C [[ GPS 59 LOOP 177 THUMBSIZE 2 HEIGHT 480 WIDTH 480 ]]
Pattern type Oscillator
Number of cells 104
Bounding box 62×62
Period 177
Mod Unknown
Heat 215.3
Volatility 1.00
Discovered by Karel Suhajda
Year of discovery 2007

104P177 is a period 177 oscillator discovered by Karel Suhajda in June 2007.[1] In terms of its minimum population of 104 cells, it is the smallest known period 177 oscillator. It can serve as a 90° or 180° degree reflector, and with the correct phasing, a glider can pass through it unharmed. On March 21, 2009 Jason Summers found a 24-glider synthesis of this oscillator.

Image gallery

Several reactions involving 104P177
Download RLE: click here
P177 anim.gif


  1. Jason Summers' all-osc pattern collection.

External links