Difference between revisions of "Prepulsar shuttle 29"
(Corrected synthesis cost) 
(Will cost 31 gliders in latest update) 

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isorulemin = B3k/S23ck  isorulemin = B3k/S23ck  
isorulemax = B35ck6ek7/S234ckyz5kqr6ei78  isorulemax = B35ck6ek7/S234ckyz5kqr6ei78  
+  synthesis = 31  
plaintext = true  plaintext = true  
rle = true  rle = true 
Revision as of 05:50, 9 June 2019
Prepulsar shuttle 29  
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Pattern type  Oscillator  

Oscillator type  Shuttle  
Number of cells  54  
Bounding box  28×28  
Period  29  
Mod  29  
Heat  41.5  
Volatility  0.90  
Strict volatility  0.90  
Discovered by  David Buckingham  
Year of discovery  1980  
 
 
 

Prepulsar shuttle 29 (or prime^{[citation needed]}) is a period 29 shuttle oscillator discovered by David Buckingham on August 2, 1980,^{[1]} making it the first oscillator of that period to be found. In terms of its 54 cells it is the smallest known period 29 oscillator.^{[2]} The oscillator works by combining the 15generation, twotub prepulsar shuttle mechanism used in Eureka with a 14generation prepulsar shuttle mechanism. Hassling prepulsars in this way was the only known way of constructing period 29 oscillators until the discovery of the p29 trafficfarm hassler, and some variations of this shuttle are shown below. In September 1994 Bill Gosper found that two copies of prepulsar shuttle 29 could be used to hassle a pentadecathlon. Gosper used it to construct the p58 toadsucker.
A 42glider synthesis is known for a variant of this oscillator, 56P29, which is shown below.^{[3]}
Image gallery
See also
References
 ↑ Dean Hickerson's oscillator stamp collection. Retrieved on June 16, 2009.
 ↑ "Class 2 Objects Catalog". Retrieved on June 10, 2009.
 ↑ Adam P. Goucher. "xp29_wgg0s4w255202552w4s0ggz320f811w4r4x4r4w118f023zzy4252y1252". Catagolue. Retrieved on June 6, 2019.
External links
 54P29.1 at Heinrich Koenig's Game of Life Object Catalogs
 Patterns
 Oscillators with 54 cells
 Patterns with 54 cells
 Patterns found by David Buckingham
 Patterns found in 1980
 Patterns that can be constructed with 31 gliders
 Oscillators
 Periodic objects with minimum population 54
 Shuttles
 Oscillators with period 29
 Oscillators with mod 29
 Oscillators with heat 41
 Oscillators with volatility 0.90
 Oscillators with strict volatility 0.90
 Pages needing attention
 Patterns with bilateral diagonal symmetry
 Sparkers
 Sparkers with period 29
 Strong sparkers
 Prepulsar shuttle oscillators