Period-15 glider gun

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 ]]
View static image
Pattern type	Gun
Number of cells	122
Bounding box	32 × 31
Period	15
Barrels	1
Discovered by	Period1GliderGun
Year of discovery	2024
Rules Outer-totalistic rules B3/S23 only # of rules 20 = 1 Isotropic rules B3/S23 – B36e7c/S234cy6ei
Pattern files Plaintext period15glidergun.cells RLE period15glidergun.rle

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. 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. (click above to open LifeViewer)

External links

• guntrue_15 at Adam P. Goucher's Catagolue (linear growth)