p129 R-pentomino hassler

p129 R-pentomino hassler
x = 65, y = 29, rule = B3/S23 26bo$24b3o$23bo$23b2o$2o$bo$bobo$2b2o2$20b2o$19b2o$20bo6$44bo$44b2o$ 43b2o2$61b2o$61bobo$63bo$63b2o$40b2o$41bo$38b3o$38bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 3 ZOOM 15 GPS 20 WIDTH 510 HEIGHT 1100 ANGLE 90 ]]
View static image
Pattern type	Oscillator
Number of cells	38
Bounding box	65 × 29
Period	129
Mod	129
Heat	35.5
Volatility	0.96
Strict volatility	0.96
Discovered by	Luka Okanishi Luke Kiernan
Year of discovery	2022
Rules Outer-totalistic rules B3/S23 only Important rules Conway Life # of rules 20 = 1 Isotropic rules B3/S23 – B3/S234c
Glider synthesis Fewest gliders 14 Catagolue-generated RLE p129rpentominohassler_synth.rle
Pattern files Plaintext p129rpentominohassler.cells RLE p129rpentominohassler.rle
Identifiers apgcode xp129_ggyhca23z0346ycggzyf13zyzy0gs8zyzyi62sgzyyc453

p129 R-pentomino hassler (or 38P129) is a period-129 oscillator discovered by Luka Okanishi on August 21, 2022, based on a partial found on the previous day. It is the smallest known period-129 oscillator, superseding the 146-cell p3 22hd reflector loop.

The only known oscillators with greater period and fewer cells are Gabriel's p138 (36 cells), pentadecathlon on Rob's p16 (p240, 33 cells), and an infinite family of extensions of the p60 glider shuttle of period 60 + 120 N (29 cells).

A 14-glider synthesis of this oscillator was found on the day of its discovery.

A new period-129 glider gun was found on August 21, 2022 and reduced on August 25, 2022; it was the smallest known gun with this period until the discovery of the period-43 glider gun.

External links

• p129 R-pentomino hassler at Adam P. Goucher's Catagolue