Period-15 glider gun

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Period-15 glider gun
x = 32, y = 28, rule = B3/S23 20b2o$10bo8bobo$9bobo2b3obobo$10bo3bobob2o$16b3o$12b2o6b3o$2o10b3obo$b o11b3obo$bobo11b2o$2b2o5b2o2$9bobo$8b4o2b2o$2b2o4b2o2b4o$bobo8bobo$bo$ 2o11b2o$7b2o$6bob3o15b3o$7bob3o7b3o3bo3bo$b3o6b2o7b3o2bo5bo$5b3o$4b2ob obo3bo5bobobo7bo$3bobob3o2bobo4bobobo7bo$2bobo8bo$2b2o15b3o2bo5bo$19b 3o3bo3bo$26b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ ZOOM 8 AUTOSTART OFF ]]
Pattern type Gun
Number of cells 122
Bounding box 32 × 31
Period 15
Barrels 1
Discovered by Period1GliderGun
Year of discovery 2024

A period-15 glider gun is any true period 15 glider gun.

The first, and so far only, true period 15 glider gun was discovered by Period1GliderGun on March 1, 2024.[1] It was found 4 hours and 59 minutes after the first period-16 glider gun, making it the second true-period glider gun with period below 20 to be found.

The gun can easily be made double-barrelled by replacing two eater 1s with a Karel's p15.

The period-5 sparker that provides a corner dot spark is 5blink. It can be replaced with other sparkers such as toaster or middleweight volcano. The base oscillator is a B-heptomino hassler found by Carson Cheng in 2023.

x = 81, y = 37, rule = B3/S23 24b2o24b2o$25bo23b3o$8b2o6bo8bobo9bo8bob2o9b2o$7bo6b3o9b2o9bobo6bo2bo 4bo5bo$4bo5bo2bo24bobo5bob2o5bo$3bobo2b2o3b2o23bo2bo7b3o3bo3bo$3b3o32b obo9b2o5bo7b4o$4b2o5bo25bobo24b6o$3b2o5b3o4b2o18bo9bo15b8o$3bo5b2ob2o 4bo29b2o12b2o6b2o$3bo6b3o5bobo5b2o19b2o14b8o$3b2o6bo7b2o5b2o36b6o$4b2o 23b2o10bo23b4o10b2o$3b3o23b3o7bobo33b3o2bo$4b2o11bo11b2o6b2o39b2o$18b o7b2o9b2o35bo$b2o13b3o7b2o9b2o15bobo8b3obo4bo$b3o35bobo7b2o4b2o9bob2o 8b2o$b2o8bo17bo11bo7bobo3bo7bo2b2obo5b3o2bo$2b2o6b3o16bobo19bo11bo2bo 12b2o$3bo5b5o15b2o20b2o10bobo$3bo4bobobobo$2b2o4b2o3b2o10bo$b2o20bobo 12b2o22bo$b2o21b2o11b4o13b2o7b2o$obo8bo25b2ob2o10b2ob2o5b2o$bo8bobo26b 2o11b4o$10bobo15b2o23b2o12bo$11bo4bobo10b2o34bobo$11b2o3bo2bo8bo37b2o $11b2o6b2o11b2o$10bo2bo3bo3b2o8bobo16bo2bob2obo2bo7bobo$11b2o6b2o9bo6b 2o2b2o6b2o2bo4bo2b2o7b2o$16bo2bo10bo2bo2bo2bob2o7bo2bob2obo2bo8bo$16b obo11bo6b2o35bo$31bobo41bo$32b2o39b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ]]
Former smallest pseudo-period 15 gun.[2]
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  1. eRroR_6o6 (March 1, 2024). Re: Gun Discussion Thread (discussion thread) at the forums
  2. Hotcrystal0 (March 1, 2024). Re: Gun Discussion Thread (discussion thread) at the forums

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