Silver's p5

	Silver's p5
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	<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 11, y = 7, rule = B3/S23 2o$o$bo2bo$3b2o$3bo3bob2o$2bo4b2obo$2b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ GPS 2 THUMBSIZE 2 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type	Oscillator
Number of cells	17
Bounding box	11×7
Period	5
Mod	5
Heat	8.8
Volatility	0.63
Strict volatility	0.63
Discovered by	Stephen Silver
Year of discovery	2000
Rules
Outer-totalistic rules	B3/S23 – B378/S0238
Important rules	Conway Life
# of rules	24 = 16
Isotropic rules	B3-r/S2-in3aijnq – B34-arw5-c6-an78/S0234cektwy5-in6-a7e8
Glider synthesis
Fewest gliders	15
Catagolue-generated RLE	silversp5_synth.rle
Uploaded synthesis RLE	silversp5_synth.rle
Pattern files
Plaintext	silversp5.cells
RLE	silversp5.rle
Identifiers
apgcode	xp5_wftsw6246z32
Pentadecathlon ID	17P5.2

Silver's p5 is a period-5 oscillator that was found by Stephen Silver on February 17, 2000.[1] In terms of its 17 cells it is the third smallest known period 5 oscillator, after pseudo-barberpole and octagon 2. As it has no spark, it appears upon first glance to be useless. Nonetheless, in March 2000, David Eppstein found a way to use it to reduce the size of Noam Elkies' period 5 reflector. In May 2007 Mark Niemiec found a 14-glider synthesis of a variation of this oscillator that uses an aircraft carrier rather than a snake for stabilization.

A version of this oscillator substituting an eater for a snake first occurred naturally on January 5, 2016, in a soup submitted to Catagolue by Adam P. Goucher.[2]

References

Jason Summers' jslife pattern collection. Retrieved on March 14, 2020.
gameoflifeboy (January 5, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums

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