Period-48 glider gun

Period-48 glider gun
x = 30, y = 16, rule = B3/S23 28b2o$13b2o13bo$13b2o11bobo$20b2o4b2o$19b2obo$20bob2o$21b2o$3o4bob2o$ 4b3obo7b3o$5b2o8bo3bo$3b2ob2o7bo3bo$4bobobo6bob2o7b2o$3b2ob2o18bobo$3b o6b2o9bo6bo$10b2o10bo5b2o$20b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 GPS 12 WIDTH 520 HEIGHT 480 ZOOM 16 ]]
View static image
Pattern type	Gun
Number of cells	53
Bounding box	31 × 16
Period	48
Barrels	1
Discovered by	Tanner Jacobi goldenratio iNoMed praosylen James Pascua
Year of discovery	2022
Rules Outer-totalistic rules B3/S23 – B3/S238 # of rules 21 = 2 Isotropic rules B3/S23 – B34c/S234c8
Pattern files Plaintext period48glidergun.cells RLE period48glidergun.rle

A period-48 glider gun is any glider gun with a true period of 48. The original version, found by Tanner Jacobi in 2016, was based on the period-24 glider gun, using the Rich's p16 oscillator as a filter to remove half of the gliders from the stream. In January 2019 a slightly smaller period-48 glider gun was constructed -- 51 × 35, 252 cells minimum -- based on the newly discovered period-24 dueling banjos oscillator. Both of these guns are shown in the gallery below.

On December 21, 2021, goldenratio constructed a brand-new p48 glider gun using a new mechanism. Reductions by iNoMed and praosylen brought it down to a bounding box of 35 × 16 -- the third-smallest of any unique-period glider gun. On January 10, 2022, James Pascua found a reduction to 31 × 16 using Rob's p16, beating out the p46 gun for second place. This version is shown in the infobox to the right. As of October 2022, the p48 gun has fallen back to third place upon the discovery of a smaller period-24 glider gun.

Gallery

x = 47, y = 41, rule = B3/S23 17b2o11b2o$16bo2bo9bo2bo$16bobo3b2ob2o3bobo$14b2o2bobo7bobo2b2o$15bobo bo4bo4bobobo$14bo2b2o2b7o2b2o2bo$14b2o5bobobobo5b2o$23bobo$5bo2b2o9b3o 5b3o$4bobo2bo2bo5bobobo3bobobo$4bob2obobobo4b2o2b5o2b2o$3b2obo2bobo2bo $3bo2bob2o2bo$4b3obobo3b3o$6b2obo5b2o$2bobo2bobo3bo2bo4bobobo$2b2o2b2o bob2o2b3o4b3o13b2o$8b2obo3b2o6bo13bo2bo$2b5o4bo24b2o$bo4bob3o17b2o5b3o 5bo$bob2obobo6b2o7bo3bobo4bo2bo3bobo$2obo2bo6b4o8bo4bo5b3o3b2o$bobobob o5b2o2bo5b3o4b2o$bobob2obo2bo24b3o3b2o$2ob2o2b2o3b4o19bo2bo3bobo$3bo2b 3o2bo2b2o4bo14b3o5bo$3bobob2o5bo4bobo8bo5b2o$2b2obo2b2obo2bo3bo3bo8bo 5bo2bo$4bo3b2o2bo2bo3bobo7b3o6b2o$4bobo7bo5bo$3b2ob2o10b3o$10b2o4b7o4b 2o$10bo2bo2b2obob2o2bo2bo$11b2ob4o3b4ob2o$8b3o2bo11bo2b3o$7bo3b2ob2o7b 2ob2o3bo$7b2obo3b2o7b2o3bob2o$8bob3o3bo5bo3b3obo$7bo6b2o7b2o6bo10bo$8b 6o11b6o12bo$10bo2bo11bo2bo12b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 12 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 10 WIDTH 600 HEIGHT 480 ]] Original period-48 gun (click above to open LifeViewer) RLE: here Plaintext: here

x = 51, y = 35, rule = B3/S23 5b2ob2o15b2ob2o$5b2obo4b2o5b2o4bob2o$8bo2bo3b2ob2o3bo2bo$8b2obo11bob2o 6bo$11bo11bo8b3o$3bobo6bo3bobo3bo7b2o3bo$b3ob3o5b3o3b3o8b3o2b2o$o7bo5b o5bo14bobo$bob6o3b3o5b3o4b2o2b4ob3o$b2o4bo4b3o5b3o4b2obo4bo3bo$3bo3b2o 4b2o5b2o4bobobob2obo3b2o$2bobo2bobo5bo3bo5b2o3bob2obobobo$3bo2bo6bo2bo bo2bo4bo3bo4bob2o$6bo3bobo3bobo3bo4b3ob4o2b2o$6bo3bo2bo2bobo2bo6bobo$ 6bo6b3o3b3o7b2o2b3o$6bo2bo20bo3b2o$7bo7bo15b3o$5bobobo5bo16bo$4bobob2o 32b2o$4bobo6bo3bo7bo15bo2bo$5b2o4b3obob3o6bo13b2o$10bo3b2o4bo3b3o12b3o 5bo$10bob2o2b2obobo17bo2bo3bobo$11bo2b2o2b2obo18b3o3b2o$12b2o2b2obob2o $14bo2bobobo2bo6bo8b3o3b2o$14b4ob2o2b2o7bo6bo2bo3bobo$18bo11b3o6b3o5bo $16bobo21b2o$16b2o23bo2bo$42b2o$37bo$38bo$36b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 12 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 10 WIDTH 600 HEIGHT 480 ]] Period 48 gun based on dueling banjos, also using a Rich's p16 filter to double the period (click above to open LifeViewer) RLE: here Plaintext: here

x = 35, y = 16, rule = B3/S23 33b2o$8bo9b2o13bo$7bob2o7b2o11bobo$6bo3bo14b2o4b2o$6bo5bo11b2obo$3bo2b o5bo12bob2o$2bobo7bo13b2o$3b2o2b4o$21b3o$3b2o2b4o9bo3bo$2bobo7bo7bo3bo $3bo2bo5bo7bob2o7b2o$6bo5bo18bobo$6bo3bo4b2o9bo6bo$7bob2o4b2o10bo5b2o$ 8bo16b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ GPS 12 LOOP 48 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 10 WIDTH 600 HEIGHT 480 ]] Period 48 gun found in December 2021 (click above to open LifeViewer) RLE: here Plaintext: here

x = 31, y = 20, rule = B3/S23 b2o$2bo13b2o$2bobo11b2o$3b2o3$21b2o4bobo$8b2o11b3o3b2obo$10bo14b3obo$9b2o10bo 3b2o$8b2o$3b2o17b2o3bo$2bobo19b2obo$2bo10bo5b2o6bo$b2o10bo5b2o4$2obo$ob2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 10 WIDTH 600 HEIGHT 480 ]] SKOP 96: Period 48 glider gun with boat bit (click above to open LifeViewer) RLE: here Plaintext: here

External links

• Period-48 glider gun at the Life Lexicon