56P27
56P27  
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Pattern type  Oscillator  

Number of cells  56  
Bounding box  30 × 30  
Period  27  
Mod  27  
Heat  51.3  
Volatility  0.98  
Strict volatility  0.98  
Discovered by  Nicolay Beluchenko  
Year of discovery  2010  
 
 
 

56P27 is an unnamed period27 oscillator discovered by Nicolay Beluchenko on May 11, 2010.^{[1]} In terms of its 56 cells, it is currently the smallest known period 27 oscillator. It gives dot sparks, allowing for the construction of nontrivial higherperiod LCM oscillators as seen below.
It first appeared seminaturally in October 2017, in a symmetric soup submitted to Catagolue by Apple Bottom.^{[2]} Approximately 1 in 10 billion even fourfold rotationally symmetric soups (C4_4) form a 56P27.
A 52glider synthesis for this oscillator was found by Martin Grant in 2013,^{[3]} which was reduced to 20 gliders by 2718281828 in November 2017.^{[4]}
On January 29, 2022, David Raucci used 56P27 with a block removed to create the period27 glider gun.
LCM oscillators
The oscillators below are listed due to being the smallest known ones by population while satisfying the condition that at least one cell oscillates at the full period.
68P135 with pentadecathlon (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here 
88P189 with 32P21 (click above to open LifeViewer) Catagolue: here 
97P297 with p11 domino sparker (click above to open LifeViewer) RLE: here Plaintext: here Catagolue: here 
See also
References
 ↑ Jason Summers' jslife pattern collection. Retrieved on March 14, 2020.
 ↑ Apple Bottom (October 2, 2017). Re: Soup search results (discussion thread) at the ConwayLife.com forums
 ↑ Martin Grant (August 31, 2013). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
 ↑ 2718281828 (November 12, 2017). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
External links
 Patterns
 Oscillators with 56 cells
 Periodic objects with minimum population 56
 Patterns with 56 cells
 Patterns found by Nicolay Beluchenko
 Patterns found in 2010
 Patterns that can be constructed with 20 gliders
 Oscillators
 Oscillators with period 27
 Oscillators with mod 27
 Oscillators with heat 51
 Oscillators with volatility 0.98
 Oscillators with strict volatility 0.98
 Patterns with 90degree rotation symmetry
 Sparkers
 Sparkers with period 27
 Dot sparkers
 Strong sparkers
 Domino sparkers
 Weak sparkers
 Unnamed periodic objects
 Seminatural periodic objects