Period-60 glider gun

Twogun
x = 39, y = 27, rule = B3/S23 27bo$27b4o$11bo16b4o$10bobo5b2o8bo2bo5b2o$3b2o3b2o3bo14b4o5b2o$3b2o3b 2o3bo4bobob2o3b4o$8b2o3bo5b2o3bo2bo$10bobo10bo$11bo8bo2bo2$26bobo$28bo $24bo$26bo$25bo2$11b2o$11b2o4bo$2o6b2o6b5ob2o$2o5b3o5bo2b2o4bo$8b2o5b 2o8bo12bo$11b2o4bo7bo10bobo$11b2o12bo11b2o$24bo8b2o$22b2o9bobo$35bo$ 35b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 3 ZOOM 15 WIDTH 760 HEIGHT 510 AUTOSTART OFF ]]
View static image
Pattern type	Gun
Number of cells	113
Bounding box	39 × 27
Period	60
Barrels	1
Discovered by	Bill Gosper
Year of discovery	1970
Rules Outer-totalistic rules B3/S23 – B38/S238 # of rules 22 = 4 Isotropic rules B3/S23 – B34ce5k6c7c8/S234cez5ekr6eik7c8
Pattern files Plaintext twogun.cells RLE twogun.rle

A period-60 glider gun is any glider gun with true period 60.

The first true period 60 gun to be discovered is the Twogun, found by Bill Gosper; it is shown in the infobox. It is composed of two Gosper glider guns. There are several other ways to create a p60 gun from two p30 guns using period-doubling reactions.

A smaller p60 gun with bounding box 36 × 27 = 972 cells, containing Eye of Sauron, was found by 2718281828 in November 2018, and reduced by Simon Ekström to 35 × 27 = 945 cells on the next day.

In November 2022, a smaller gun (36 × 23 = 828 cells) was found by Entity Valkyrie 2; Note that the still life it uses as a catalyst, xs29_8e1lmz3lla252z056, can be replaced with the smaller xs25_2lla8k8z3egld, which has occurred naturally, making it Spartan.

On March 19, 2024, iNoMed found a 27 × 30 = 810-cell gun using Karel's p15 and 5blink to hassle a honey farm.

On February 20, 2025, Caleb R. Hilton discovered a honeyfarm-hassling p60 glider gun which is currently the smallest known period 60 gun.

x = 23, y = 25, rule = B3/S23 2b2o10b2o3b2o$3bo3b2o5bo3bobo$2bo5bo2b2obo3bo$2b2o4bobobob2ob2o$5b2ob obo$5obobob2ob2ob2obo$o7bo6b2ob2o$2bob2ob2o$b3o$o$2o4$21b2o$21b2o$13b o$12bob2o$12bo2bo$2b2o9b3o$bo2bo14b2o$bobo15bobo$2bob2o15bo$3b3o15b2o $4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 10 WIDTH 600 HEIGHT 400 THEME 6 GPS 12 AUTOSTART KILLGLIDERS ]]

Caleb R. Hilton's gun, currently the smallest known p60 gun
(click above to open LifeViewer)

x = 24, y = 27, rule = B3/S23 2o$obo8bo$bobo2b2o2bobo4b2o$3b3obo3bo4bobo$o3bo11bo$o8bo4b2obo$o3bo3b2o4bo2bo$4bob2o8b2ob2o$5bo13bobo$12b2o5bobo$11bo2bo3b2ob2o$12bobo7bo$12b3o3b2obo$18b2obobo$22b2o2$bo6bo$3bo2bo$3bo2bo$3bo2bo$bo6bo3$18bobo$b8o10b2o$bob4obo10bo$b8o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 10 WIDTH 600 HEIGHT 400 THEME 6 GPS 12 AUTOSTART KILLGLIDERS ]]

iNoMed's gun, the smallest true p60 gun known from March 19, 2024 until February 20, 2025
(click above to open LifeViewer)

x = 33, y = 23, rule = B3/S23 3bo$3b3o$6bo$5b2o$10b2o$9bo2bo12bo4bo$9bo2bo10b2ob4ob2o$9bo15bo4bo$b2o 7bo$o2bo7bo2bo$b2o2bo6b2o$3b2obo$b2o2bo13b2o$o2b2o14bobo$2o19bo$bob2o 16b2o$bo2bo$2b2o2$6b2o$7bo6bo$4b3o8b2o$4bo9b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 10 WIDTH 600 HEIGHT 400 THEME 6 GPS 12 AUTOSTART KILLGLIDERS ]]

Entity Valkyrie 2's gun from November 18, 2022.
(click above to open LifeViewer)

x = 35, y = 26, rule = B3/S23 23bo$23b4o$7bo16b4o$6bobo5b2o8bo2bo5b2o$4b2o3bo14b4o5b2o$4b2o3bo4bobob 2o3b4o$4b2o3bo5b2o3bo2bo$2o4bobo10bo$o2bo3bo8bo2bo$b3o$15bo$b3o10b3o$o bo9b2o3bo$o3bo7b3o2b2o$b4o12bobo$9b2o2b4ob3o$b2o6b2obo4bo3bo$b2o5bobob ob2obo3b2o$7b2o3bob2obobobo$8bo3bo4bob2o$9b3ob4o2b2o13bo$10bobo19bobo$ 11b2o2b3o15b2o$12bo3b2o$13b3o$14bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 10 WIDTH 600 HEIGHT 400 THEME 6 GPS 12 AUTOSTART KILLGLIDERS ]]

A reduction by Simon Ekström of a gun found by 2718281828 in 2018
(click above to open LifeViewer)

x = 46, y = 28, rule = B3/S23 15bo15b2o$3b2o10bo15bobob2o$4bo10bo17bob2o$4bobo8b2o15b2o$5bobo10bo16b 2o$6bo3b2o2bo4bo16bo$10b2o7bo16bobo$3o12b3o19b2o$3o$bo27bo$bo26b3o$bo 16b2o7b5o6b2o$obo13b2o2b2o4b2o3b2o5bo$14b2o4b2o5b5o7b3ob2o$11bo10bo4bo 3bo9bob2o$obo7b3obob4o2bo5bobo$bo7bo2b4obob3o7bo12b3o$bo7bo10bo15bo5bo 2bo$bo8b2o4b2o18bobo5b2o$3o7b2o2b2o13b2o8b2o$3o9b2o14bo2bo7b2o$29b2o8b 2o$36bobo$36bo$7b3o4b3o$6bob3o2b3obo11bo$7b2ob4ob2o13bo$28b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 8 WIDTH 600 HEIGHT 400 THEME 6 GPS 12 AUTOSTART KILLGLIDERS ]]

A gun found on July 19, 2021
(click above to open LifeViewer)

x = 40, y = 35, rule = B3/S23 26bo$24b3o$23bo$6bobo2bobo9b2o$2b2obo2bo2bo2bob2o$6bobo2bobo9$bo2bob2o bo2bo$2o2bo4bo2b2o5bo$bo2bob2obo2bo6bo$19b2o$20bo6bo2bob2obo2bo$20bo5b 2o2bo4bo2b2o$27bo2bob2obo2bo6$7b2o$5bo4bo$4bo6bo$3bo8bo3bo9bobo2bobo$ 3bo8bo4b2o3b2obo2bo2bo2bob2o$3bo8bo3b2o8bobo2bobo$4bo6bo$5bo4bo$7b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 ZOOM 8 WIDTH 600 HEIGHT 400 THEME 6 GPS 12 AUTOSTART KILLGLIDERS ]]

A gun found by EvinZL on August 7, 2022, based on a p60 LoM hassler found by Carson Cheng earlier the same day
(click above to open LifeViewer)

See also

• Oscillators with period 60 (category)

External links

• p60 gun at the Life Lexicon
• guntrue_60 at Adam P. Goucher's Catagolue (linear growth)
• jslife-20121230.zip/osc/o0060-gun.lif in Jason Summers' pattern collection