p47 pre-pulsar shuttle
|p47 pre-pulsar shuttle|
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|View static image|
|Number of cells||84|
|Discovered by||David Buckingham|
|Year of discovery||1982|
p47 pre-pulsar shuttle is a period-47 shuttle oscillator discovered by David Buckingham on December 5, 1982 and was the first oscillator of that period to be discovered. It consists of four tubs, four blinkers, four eater 1s and two blocks hassling two pre-pulsars. Hassling pre-pulsars in manners similar to this was the only known method of constructing period-47 oscillators until discovery of the Snark in 2013. In terms of its 84 cells, it is the smallest known period-47 oscillator.
In May 2003 Jason Summers found that sparks from four copies of this oscillator could be used to support a period-47 t-tetromino engine, and in February 2009 Nicolay Beluchenko noticed that this only required two copies of the oscillator, as shown below.
- Pre-pulsar shuttle
- p26 pre-pulsar shuttle
- p28 pre-pulsar shuttle
- p29 pre-pulsar shuttle
- p58 pre-pulsar shuttle
- p55 pre-pulsar hassler
- Dean Hickerson's oscillator stamp collection. Retrieved on June 18, 2009.
- "New Oscillators". H. Koenig (March 16, 2009). Retrieved on March 28, 2009.
- Martin Grant (October 6, 2013). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- Matthias Merzenich (December 11, 2019). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- 84P47.1 at Heinrich Koenig's Game of Life Object Catalogs