30P25 is a period -25 oscillator discovered by Charity Engine on May 18, 2022 by symmetric soup search.[1] It is composed of an unnamed reaction stabilized by two copies of eater 1 . In terms of its 30 cells , it is the smallest known period-25 oscillator, far ahead of the previous record (p25 pre-pulsar shuttle ) with 83 cells.
It can be synthesized in 14 gliders. The active region has exactly one 3-glider synthesis, which is used. There are two of these, and each of the two fishhooks requires four gliders, for a total of 14.[2]
It gives off sparks , which allows for the construction of non-trivial higher-period LCM oscillators ,[3] shown in the gallery below. However, unlike the similar Jason's p22 , its sparks are not strong enough to perturb active regions.
The oscillators below are listed due to being the smallest known ones by population, while also satisfying the condition that at least one cell oscillates at the full period.
x = 25, y = 22, rule = B3/S23
19bo$17b3o$16bo$16b2o2$13bo$12b2o$11b2o$14b2o$13b3o$4b3o$4b2o$7b2o$6b
2o11b2o$6bo12bo2bo$15bo4bo3bo$2b2o12b2o3bob2o$3bo$3o9b2obo3b2o$o11bo3b
o4bo$14bo2bo$16b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 50 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p50 with 24P10 (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 20, y = 25, rule = B3/S23
o$3o$3bo$2b2o2$5bo$3b2ob2o2$7bo$3b2o2bo6bo$5bo6bo2b2o$12bo2$12b2ob2o$
14bo2$16b2o$16bo$17b3o$19bo3$7b8o$7bob4obo$7b8o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 75 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p75 with pentadecathlon (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 20, y = 20, rule = B3/S23
18b2o$18bo$16bobo$10bo2bo2b2o$10bo2bo$9bo4bo$13bo$10b2obo5$6bob2o$6bo$
5bo4bo$6bo2bo6b3o$2b2o2bo2bo4bob3o$bobo9bobobo$bo11bo2bo$2o12b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 100 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p100 with mold (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 23, y = 23, rule = B3/S23
2b2o$bobo$3o$2o19b2o$bobo17bo$2bobo2b2o10bobo$3bo2bobo4bo2bo2b2o$4b4o
5bo2bo$5b2o5bo4bo$16bo$13b2obo5$9bob2o$9bo$8bo4bo$9bo2bo$5b2o2bo2bo$4b
obo$4bo$3b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 150 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p150 with unix (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 32, y = 20, rule = B3/S23
12b2o$13bo$13bobo$7b2o5b2o3bo$2b3o2bobo10b2o$2bo2b3obo10b2o$bob3obob2o
5bo3bo3bo$3o2b4o2bo2bobo3bo3b3o$3o7b3o6b2o3b3o$bo2b4o2b3o6b2o4b3o$2b2o
bob3obo4b3o4b2o$3bob3o2bo6b3o3b2o$3bobo2b3o6b3o3bo3bobo$4b2o13bo3bo3bo
$22b2o$22b2o$24bo3b2o$28bobo$30bo$30b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 175 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p175 with meatball (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 29, y = 20, rule = B3/S23
18b2o$18bo$16bobo$12bo3b2o$10b2o$10b2o$7bo3bo3bo5b2o$5b3o3bo3bobo$5b3o
3b2o6bo3bo$4b3o4b2o6bo4bo$7b2o4b3o5bobobo$7b2o3b3o7bobobo$2bobo3bo3b3o
8bo4bo$4bo3bo3bo11bo3bo$8b2o$8b2o15b2o$2b2o3bo$bobo$bo$2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 200 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p200 with figure eight (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 31, y = 28, rule = B3/S23
18b2o$18bo$16bobo$12bo3b2o$10b2o$10b2o$7bo3bo3bo$5b3o3bo3bobo$5b3o3b2o
$4b3o4b2o$7b2o4b3o$7b2o3b3o$2bobo3bo3b3o$4bo3bo3bo5bo7bo$8b2o5bo13bo$
8b2o5bo4bo3bo4bo$2b2o3bo12bo3bo$bobo10bob2obo5bob2obo$bo12b2o3b2o3b2o
3b2o$2o18b5o$21b3o$22bo3$19b2o3b2o$20bo3bo$17b3o5b3o$17bo9bo!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 225 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p225 with 48P9 (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 23, y = 25, rule = B3/S23
18b2o$18bo$16bobo$12bo3b2o$10b2o$10b2o$7bo3bo3bo$5b3o3bo3bobo$5b3o3b2o
$4b3o4b2o$7b2o4b3o$7b2o3b3o$2bobo3bo3b3o$4bo3bo3bo$8b2o7b3o$8b2o5b3obo
$2b2o3bo11bob2o$bobo9bo3b3o2bo$bo11bo2b2o2b2o$2o7b2o3b2o2b2o$9bo2bobob
o2bo$11b2o2b4o$12bo$11bo5b2o$11b2o4b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 275 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p275 with p11 domino sparker (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 25, y = 30, rule = B3/S23
13bobobobo$12bob2ob2obo$10b3o7b3o$9bo4b2ob2o4bo$9bo2b2obobob2o2bo$8b2o
bobo5bobob2o$9bobo2b2ob2o2bobo$9bobo3b3o3bobo$10bo11bo2$2o$bo$bobo12bo
$2b2o3bo7bobo$8b2o$8b2o5bo3bo$4bo3bo3bo6bo$2bobo3bo3b3o3bo$7b2o3b3o4b
3o$7b2o4b3o5bo$4b3o4b2o$5b3o3b2o$5b3o3bo3bobo$7bo3bo3bo$10b2o$10b2o$
12bo3b2o$16bobo$18bo$18b2o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 325 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p325 with 66P13 (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
x = 20, y = 42, rule = B3/S23
o$3o$3bo$2b2o2$5bo$3b2ob2o2$7bo$3b2o2bo6bo$5bo6bo2b2o$12bo2$12b2ob2o$
14bo$2bo$2b3o11b2o$5bo10bo$4b2o11b3o$5b3o11bo$6b3o$6b4o$9b2o$9b3o$6b2o
bo$6b2o6$6b2o$4bob2o$2b3o$3b2o$4b4o$5b3o$6b3o$8b2o$8bo$9b3o$11bo!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ GPS 25 LOOP 550 THUMBSIZE 2 ZOOM 12 HEIGHT 450 ]]
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p550 with Jason's p22 (click above to open LifeViewer )RLE : here Plaintext : here Catagolue : here
References
See also
32P21 , also found by Charity Engine via rotationally symmetric soup
External links