Elkies' p5
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Elkies' p5  
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Pattern type  Oscillator  

Number of cells  20  
Bounding box  9×8  
Frequency class  43.0  
Period  5  
Mod  5  
Heat  6.8  
Volatility  0.55  
Strict volatility  0.55  
Discovered by  Noam Elkies  
Year of discovery  1997  
 
 
 

Elkies' p5 is a period 5 oscillator that was found by Noam Elkies in 1997.
Elkies' p5 first occurred naturally in a soup found by Adam P. Goucher's apgsearch program in April 2015. Other efforts from apgsearch allowed a 15glider synthesis of an 18cell still life which can be converted to Elkies' p5. This 20glider synthesis was completed by Brett Berger and Martin Grant. This was further improved to 8 gliders by Brett Berger and Martin Grant following a second natural occurrence in January 2016.
Commonness
On Catagolue, it is the third most common period 5 oscillator, after octagon II and fumarole.^{[1]}
See also
References
 ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
External links
 Elkies' p5 at the Life Lexicon
 20P5.11 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
 Patterns
 Patterns with Catagolue frequency class 43.0
 Natural periodic objects
 Oscillators with 20 cells
 Patterns with 20 cells
 Patterns found by Noam Elkies
 Patterns found in 1997
 Patterns that can be constructed with 8 gliders
 Oscillators
 Periodic objects with minimum population 20
 Oscillators with period 5
 Oscillators with mod 5
 Oscillators with heat 6
 Oscillators with volatility 0.55
 Oscillators with strict volatility 0.55
 Sparkers
 Sparkers with period 5
 Moderate sparkers
 Nonreflecting duoplet sparkers