Find the largest c/1 spaceship

[Saka]

The title says it all, find the largest spaceship that travels at c (or c/1 or the speed of light, no extendable spaceships allowed!)
This is the largest I have found:

Code: Select all

x = 13, y = 19, rule = B2478/S23
10bo$8bobobo$6bobob2o$7b2obo$2bo5bobo$obobo3bobo$b2obobo2b2o$2bobobo3b
o$2bobobo3bo$2bob2o2bo2bo$2bobo3bo$2bobo3b3o$2bobo3bo$2bobo2bo$2bobo$
2bob3o$bo2bo2$2b2o!

The rule that is in is up to you

[lukebradford]

Live Free or Die has a wide variety of c spaceships. Here's one with a minimum population of 126 cells, the tricycle ship:

Code: Select all

x = 37, y = 26, rule = s0/b2
24bo$23b2obo$17bo9bo$16bobo5bo4bo$16bo2bo7bobo$o8bo6bo4bo2bobo$bo18bob
o2bob2o$bo7bo4bobo8bo4bo$o10bobobobo7bo3bobo$14bo7bo2bo3bo2bo$5bo19bo
7bo$bo2b2obo16bo2bo4bobo$bo2bobo2b2o2bo22bo$bo2bobo2b2o2bo22bo$bo2b2ob
o16bo2bo4bobo$5bo19bo7bo$14bo7bo2bo3bo2bo$o10bobobobo7bo3bobo$bo7bo4bo
bo8bo4bo$bo18bobo2bob2o$o8bo6bo4bo2bobo$16bo2bo7bobo$16bobo5bo4bo$17bo
9bo$23b2obo$24bo!

[Rocknlol]

I took Brian Prentice's shuttle ship from his Snake rule and modified it to be as small as possible. The end result is a c ship with a minimum population of 2358.

Code: Select all

x = 261, y = 104, rule = 03467/25/6
28.BA3.ED$25.A.2BCA3.2D$24.6ADADE.E$24.4A2BDE$25.A.BAB2.D$28.A.BABC$
29.B2AC$29.3BCE2.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A6.AC5.E.A
7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A6.E$29.B2AC122.C2.A4.2E95.E$28.A.BAB
C121.3AB$25.A.BAB2.D122.D2AD$24.4A2BDE16.A.C.E103.2E6.2D54.DCB29.2A$
24.6ADADE.E11.2ABADC.E2.ABCDE94.2D6.2E49.A.A.2DE2B28.2B$25.A.2BCA3.2D
11.2ABADC.E.ABCDE102.D2BD47.4ABABC.C28.2C$28.BA3.ED13.A.C.EBADB.DB.D
86.2A14.2C48.4ABC2D30.2D$52.ABCDE.2ABD2E84.2A13.B2AB48.A.A.DBD30.2E$
42.DCB7.A.BCEA3.E2C83.B2AB13.2A52.A.2A2E$37.A.A.2DE2B5.ABCDE6.2B84.2C
14.2A52.3A.2D$36.4ABABC.C5.ABCDE6.2A2.2E79.D2BD68.2AC2.A7.A7.A6.DE$
36.4ABC2D22.2D80.2E22.2D44.3A.2D20.2A.ED$37.A.A.DCD22.2C80.2D22.2E44.
A.2A2E20.2B$12.A.C.E23.2AC.DCDE18.2B103.D2BD40.A.A.DBD22.2C$11.2ABADC
.E2.ABCDE17.D2CE18.A4.2E68.2A30.2C40.4ABC2D22.2D$11.2ABADC.E.ABCDE18.
3DE3.A7.A7.A3.2D68.2A29.B2AB39.4ABABC.C5.ABCDE6.2A2.2E$12.A.C.EBADB.D
B.D17.D2CE23.2C67.B2AB29.2A41.A.A.2DE2B5.ABCDE6.2B$16.ABCDE.2ABD2E12.
2AC.DCDE22.2B68.2C30.2A46.DCB7.A.BCEA3.E2C$6.DCB7.A.BCEA3.E2C9.A.A.DC
D26.2A67.D2BD87.ABCDE.2ABD2E$.A.A.2DE2B5.ABCDE6.2B8.4ABC2D96.2E38.2D
24.B.D17.A.C.EBADB.DB.D$4ABABC.C5.ABCDE6.2A2.2E4.4ABABC.C94.2D38.2E
22.3ACBED3.ABCDE6.2ABADC.E.ABCDE$4ABC2D22.2D5.A.A.2DE2B133.D2AD21.3AC
BED2.ABCDE7.2ABADC.E2.ABCDE$.A.A.DCD22.2C10.DCB33.2E52.2A46.2B24.B.DA
.CAECAEC.E6.A.C.E$4.2AC.DCDE18.2B46.2D52.2A45.C2BC26.ABCDE2.AC2DE$7.D
2CE18.A4.2E42.2C51.B2AB45.2B16.CBA3.E5.ABDAE2.D2B$7.3DE3.A7.A7.A3.2D
42.2B52.2C45.D2AD12.A.2CD2A2.2E2.ABCDE5.2A2.2E$7.D2CE23.2C42.2A51.D2B
D45.2E11.6ABEBE5.ABCDE9.2D$4.2AC.DCDE22.2B96.2E46.2D11.4AB2CE21.2C$.A
.A.DCD26.2A96.2D61.A.CAC22.2B$4ABC2D164.2A24.2A2D20.2A2.2E$4ABABC.C
76.2E36.2A46.2A23.2A.2C23.DC$.A.A.2DE2B76.2D36.2A45.B2AB22.A.B2.A7.A
7.A6.CD$6.DCB9.A.BDEC18.2E42.2C35.B2AB45.2C23.2A.2C$18.2A2C2B18.2D42.
2B36.2C45.D2BD23.2A2D28.2E$15.A.B2A2.ECD17.2C42.2A35.D2BD45.2E21.A.CA
C30.2D$14.5A2CBE20.AB79.2E46.2D19.4AB2CE29.2C$14.5ACDCB2.2EA7.A7.BA
79.2D67.6ABEBE27.2B$15.A.A.D2C4.E137.2A29.A.2CD2A2.2E24.2A$18.2A2CE
71.2E20.2A46.2A32.CBA3.E$19.B2AB71.2D20.2A45.B2AB$20.2A.AE68.CB20.B2A
B45.2C$20.2A2.AE4.A7.A7.A7.A7.A7.A7.A7.A6.BC21.2C45.D2BD72.DE$30.2D
83.D2BD45.2EBA7.A7.A7.A7.A7.A7.A7.A7.A7.ED$28.2D.B84.2E46.2D.B$28.2EB
A7.A7.A7.A7.A7.A7.A7.A7.A7.ED11.2D48.2D$27.D2BD72.DE51.2A2.AE4.A7.A7.
A7.A7.A7.A7.A7.A6.BC$28.2C78.2A46.2A.AE68.CB$27.B2AB77.2A45.B2AB71.2D
$28.2A32.CBA3.E38.B2AB43.2A2CE71.2E$28.2A29.A.2CD2A2.2E24.2A12.2C41.A
.A.D2C4.E$57.6ABEBE27.2B11.D2BD39.5ACDCB2.2EA7.A7.BA$36.2D19.4AB2CE
29.2C12.2E40.5A2CBE20.AB$36.2E21.A.CAC30.2D12.2D41.A.B2A2.ECD17.2C42.
2A$35.D2BD23.2A2D28.2E58.2A2C2B18.2D42.2B$36.2C23.2A.2C34.2A40.DCB9.A
.BDEC18.2E42.2C$35.B2AB22.A.B2.A7.A7.A6.CD9.2A35.A.A.2DE2B76.2D$36.2A
23.2A.2C23.DC8.B2AB33.4ABABC.C76.2E$36.2A24.2A2D20.2A2.2E8.2C34.4ABC
2D$59.A.CAC22.2B11.D2BD34.A.A.DCD26.2A$44.2D11.4AB2CE21.2C12.2E38.2AC
.DCDE22.2B$44.2E11.6ABEBE5.ABCDE9.2D12.2D41.D2CE23.2C42.2A$43.D2BD12.
A.2CD2A2.2E2.ABCDE5.2A2.2E55.3DE3.A7.A7.A3.2D42.2B$44.2C16.CBA3.E5.AB
DAE2.D2B8.2A49.D2CE18.A4.2E42.2C$43.B2AB26.ABCDE2.AC2DE7.2A46.2AC.DCD
E18.2B46.2D$44.2A24.B.DA.CAECAEC.E7.B2AB42.A.A.DCD22.2C10.DCB33.2E$
44.2A22.3ACBED2.ABCDE10.2C42.4ABC2D22.2D5.A.A.2DE2B44.A.C.E$68.3ACBED
3.ABCDE8.D2BD41.4ABABC.C5.ABCDE6.2A2.2E4.4ABABC.C43.2ABADC.E2.ABCDE$
52.2D16.B.D19.2E43.A.A.2DE2B5.ABCDE6.2B8.4ABC2D45.2ABADC.E.ABCDE$52.
2E38.2D48.DCB7.A.BCEA3.E2C9.A.A.DCD26.2A18.A.C.EBADB.DB.D$51.D2BD97.A
BCDE.2ABD2E12.2AC.DCDE22.2B22.ABCDE.2ABD2E$52.2C30.2A62.A.C.EBADB.DB.
D17.D2CE23.2C12.DCB7.A.BCEA3.E2C$51.B2AB29.2A61.2ABADC.E.ABCDE18.3DE
3.A7.A7.A3.2D7.A.A.2DE2B5.ABCDE6.2B$52.2A29.B2AB60.2ABADC.E2.ABCDE17.
D2CE18.A4.2E6.4ABABC.C5.ABCDE6.2A2.2E$52.2A30.2C62.A.C.E23.2AC.DCDE
18.2B10.4ABC2D22.2D$83.D2BD86.A.A.DCD22.2C11.A.A.DBD22.2C$60.2D22.2E
86.4ABC2D22.2D14.A.2A2E20.2B$60.2E22.2D86.4ABABC.C5.ABCDE6.2A2.2E14.
3A.2D20.2A.ED$59.D2BD110.A.A.2DE2B5.ABCDE6.2B19.2AC2.A7.A7.A6.DE$60.
2C14.2A100.DCB7.A.BCEA3.E2C18.3A.2D$59.B2AB13.2A110.ABCDE.2ABD2E18.A.
2A2E$60.2A13.B2AB105.A.C.EBADB.DB.D17.A.A.DBD30.2E$44.BA3.ED9.2A14.2C
105.2ABADC.E.ABCDE17.4ABC2D30.2D$41.A.2BCA3.2D23.D2BD104.2ABADC.E2.AB
CDE16.4ABABC.C28.2C$40.6ADADE.E16.2D6.2E106.A.C.E26.A.A.2DE2B28.2B$
40.4A2BDE20.2E6.2D142.DCB29.2A$41.A.BAB2.D18.D2AD$44.A.BABC17.3AB$45.
B2AC18.C2.A4.2E183.E$45.3BCE2.A7.A6.AC5.E.A7.A7.A7.A7.A7.A7.A7.A7.A7.
A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A7.A6.E$45.B2AC$44.A.BABC$41.A.BA
B2.D$40.4A2BDE$40.6ADADE.E$41.A.2BCA3.2D$44.BA3.ED!

[simsim314]

Here is extendable c1...

Code: Select all

x = 94, y = 25, rule = B24/S23
2b2o2$bo2bo4b2o3b2o3b2o$2bob3o16b2o$2bobo5b3ob2ob3o7b2o$b2obob3obobo4b
obob3o7b2o$obobobobobobob2obobobobob3o7b2o$2bobobobobo8bobobobobob3o7b
2o$4bo3bo5b2o5bo3bobobobob3o7b2o$27bobobobobob3o7b2o$13bo2bo12bo3bobob
obob3o7b2o$35bobobobobob3o7b2o$37bo3bobobobob3o7b2o$43bobobobobob3o7b
2o$45bo3bobobobob3o7b2o$51bobobobobob3o7b2o$53bo3bobobobob3o7b2o13b2o$
59bobobobobob3o7b2o$61bo3bobobobob3o7b2o4bo2bo$67bobobobobob3o7b3obo$
69bo3bobobobob3o5bobo$75bobobobobob3obob2o$77bo3bobobobobobobo$83bobob
obobo$85bo3bo!

EDIT Just large:

Code: Select all

x = 47, y = 10, rule = B24/S3
11b2o2b2o2b2o3b2o10b2o5b2o$13bob2obo2bo4bo2b2o7bo3bo$5b2o3bo3bo2bo7bo
5bo3bo3bo3bo$9bo4bobob6ob2obo5bobob2obo2bo$3b3o4b3o2bo8bobo2bobobo4bob
ob2o$4bo3bo4b2ob2o8bob2o3b2o5bobob3o$2obobobob2obobobo25bo$2b2ob2o4b2o
bo7b2o4b2ob3o11bo$bobobob2o3bo6b2ob2ob2ob2o$3bo3bo10bo2bo2bo2bo2bo3bo!

[lukebradford]

no extendable spaceships allowed!

[simsim314]

no extendable spaceships allowed!

It's not that so many extendable ships are known, or that they count "less". You can "squeeze" the extendable part to measure its size without the extension if you want.

Another extendable:

Code: Select all

x = 58, y = 16, rule = B24/S3
2$11b2o4b2o4b2o4b2o4b2o4b2o4b2o$6b2o2bo2bo2bo2bo2bo2bo2bo2bo2bo2bo2bo
2bo2bo2bo2b2o2$7b46o2$6bo46bo$14b2o4b2o4b2o4b2o4b2o4b2o2$11b2ob2ob2ob
2ob2ob2ob2ob2ob2ob2ob2ob2ob2o$14b2o4b2o4b2o4b2o4b2o4b2o$10bo2bo2bo2bo
2bo2bo2bo2bo2bo2bo2bo2bo2bo2bo!

[velcrorex]

Here's the best I've found yet.

Code: Select all

x = 87, y = 267, rule = B24/S13
35$28bo4bo$26bob2o2b2obo$25b2obob2obob2o$27bo6bo$27b2o4b2o$26bo8bo$11b
o6bo2bo2bobo8bobo2bo2bo6bo$10b2obo14bo4bo14bob2o$12b2obo3b2o4bo2b2o2b
2o2bo4b2o3bob2o$12bo7bobo5bob2obo5bobo7bo$11bo2bo5bob2obobo6bobob2obo
5bo2bo$12b3obo2bobo3b4o4b4o3bobo2bob3o$14bob2obo3b2o12b2o3bob2obo$15bo
6bo3bo8bo3bo6bo$17b4obo3b2o6b2o3bob4o$16bo4b2o2bo10bo2b2o4bo$17bo2bo2b
obo10bobo2bo2bo$18b2o2bo4bo6bo4bo2b2o$22bobo2b2o4b2o2bobo$15bo6b3obo8b
ob3o6bo$14b2obo3bo2bobo8bobo2bo3bob2o$16b2obobo3b2o8b2o3bobob2o$10bo5b
o6b2obo8bob2o6bo5bo$9b2obo3bo2bo2bo4bo6bo4bo2bo2bo3bob2o$8b2o6b3ob2o2b
3o8b3o2b2ob3o6b2o$11bo4bo3b2obo14bob2o3bo4bo$11b2o2bo8bo12bo8bo2b2o$
11bob2o8b3o10b3o8b2obo$10bo40bo$9b3o10b2o14b2o10b3o$23bobo10bobo$11b2o
10bob2o8b2obo10b2o$12bobo8b2o12b2o8bobo$12bob2o5bo2bo12bo2bo5b2obo$12b
2o6b2o2bo12bo2b2o6b2o$10bo2bo8bo3bo2bo2bo2bo3bo8bo2bo$12bo2bo6bo2bob2o
b2ob2obo2bo6bo2bo$11bo3b2o5b3o2b2o4b2o2b3o5b2o3bo$10b3obo7bo16bo7bob3o
$14bo6bo18bo6bo$12b2obo6b2o2bo2bo2bo2bo2b2o6bob2o$10bobobo9b2ob2ob2ob
2ob2o9bobobo$8bob2o9b2o4b2o4b2o4b2o9b2obo$11bobo3bo4bo16bo4bo3bobo$9bo
2b2obob2o3bo16bo3b2obob2o2bo$8b2o3bob2o4bobo14bobo4b2obo3b2o$10bobo2bo
bob2o2bobo10bobo2b2obobo2bobo$10bo2b2o3bo24bo3b2o2bo$8bo8b2o5bo12bo5b
2o8bo$10bob2ob2obo3bob2o10b2obo3bob2ob2obo$9bobo2bo4bo5b2o8b2o5bo4bo2b
obo$10bobo3b3o4bo14bo4b3o3bobo$12bo2bo6b2o14b2o6bo2bo$11b2o3bo7bo2bo6b
o2bo7bo3b2o$10b2o2b2o8bob2obo2bob2obo8b2o2b2o$13bo10b3o8b3o10bo$13bo
10bo3bo4bo3bo10bo$12bobo2bo2bo2bo4b2o2b2o4bo2bo2bo2bobo$10bobo2b2ob2ob
2o5bob2obo5b2ob2ob2o2bobo$18b2o7bo6bo7b2o$11bo14b3o4b3o14bo$9bob2o36b
2obo$12b2o11b2o8b2o11b2o$10bo5bo9bobo4bobo9bo5bo$12b2ob2obo7bob2o2b2ob
o7bob2ob2o$11bo2bobob2o6b2o6b2o6b2obobo2bo$12bo4bo6bo2bo6bo2bo6bo4bo$
13bo2b2o5b2o2bo6bo2b2o5b2o2bo$14b2obo7bo3bo2bo3bo7bob2o$18bo6bo2bob2ob
o2bo6bo$17b3o2bo2b3o2b2o2b3o2bo2b3o$25bo10bo$19b2obobo12bobob2o$20bo3b
ob10obo3bo$20bobob2o10b2obobo$20b3obobo2bo2bo2bobob3o$20bo2bo3b2ob2ob
2o3bo2bo$19bo3b2o5b2o5b2o3bo$18b3obo16bob3o$22bo16bo$20b2obo14bob2o$
18bobobo16bobobo$16bob2o22b2obo$15b2obob4o2bo2bo2bo2bo2b4obob2o$17bo6b
2ob2ob2ob2ob2o6bo$17b2o3bo4b2o4b2o4bo3b2o$16bo4b2o16b2o4bo$17bob2obo
16bob2obo$18bo4bo14bo4bo$20b3o16b3o$19bo22bo$20bo8bo2bo8bo$21b8ob2ob8o
$30b2o$23bo2bo8bo2bo2$24b2o10b2o$22bobo12bobo$21b2obo12bob2o$23b2o12b
2o$23bo2bo8bo2bo$21bo2bo12bo2bo$20b2o3bo10bo3b2o$19b2o2b2o12b2o2b2o$
22bo16bo$22bo16bo$21bobo2bo2bo2bo2bo2bobo$19bobo2b2ob2ob2ob2ob2o2bobo$
27b2o4b2o$20bo20bo$18bob2o18b2obo$21b2o16b2o$19bo5bo10bo5bo$21b2ob2obo
6bob2ob2o$20bo2bobob2o4b2obobo2bo$21bo4bo8bo4bo$22bo2b2o8b2o2bo$23b2ob
o8bob2o$27bo6bo$26b3o4b3o2$25b2o8b2o$26bobo4bobo$26bob2o2b2obo$26b2o6b
2o$14bo9bo2bo6bo2bo9bo$13b2obo6b2o2bo6bo2b2o6bob2o$12b2o11bo3bo2bo3bo
11b2o$15bo9bo2bob2obo2bo9bo$15b2o3bo4b3o2b2o2b3o4bo3b2o$14bo10bo10bo
10bo$15bob3o4bo12bo4b3obo$16bo3b4o14b4o3bo$18bo24bo$17bobobo18bobobo$
18bo2b2o16b2o2bo$22b2o14b2o$10bo8b2o20b2o8bo$9b2obo7bo20bo7bob2o$8b2o
10bo2bo2bo2bo2bo2bo2bo2bo10b2o$11bo3bo4b3ob2ob2ob2ob2ob2ob3o4bo3bo$11b
2o7bo3b2o4b2o4b2o3bo7b2o$11bob2o4bo22bo4b2obo$10bo4b4o24b4o4bo$11b3o
34b3o$14bobo28bobo$13bo2b2o4bo16bo4b2o2bo$14b2o4bob2o14b2obo4b2o$17b2o
b2o18b2ob2o$17bo3bo18bo3bo$16bo2bo2bo16bo2bo2bo$14bobobobobobo12bobobo
bobobo$19bo22bo$15bo2b3o2bo14bo2b3o2bo2$16b2obob2o16b2obob2o$17bo3bo
18bo3bo$17bobobo18bobobo$17b2ob2o18b2ob2o$16bo2bo2bo2bo10bo2bo2bo2bo$
17bo3bo18bo3bo$18bo2bob2o12b2obo2bo$19b3obo14bob3o$21bobo14bobo$13bo8b
2o14b2o8bo$12b2obo7bo14bo7bob2o$11b2o10bo2bo2bo2bo2bo2bo10b2o$14bo3bo
4b3ob2ob2ob2ob3o4bo3bo$14b2o7bo3b2o4b2o3bo7b2o$14bob2o4bo16bo4b2obo$
13bo4b4o18b4o4bo$14b3o28b3o$17bobo22bobo$16bo2b2o4bo10bo4b2o2bo$17b2o
4bob2o8b2obo4b2o$20b2ob2o12b2ob2o$20bo3bo12bo3bo$19bo2bo2bo10bo2bo2bo$
17bobobobobobo6bobobobobobo$22bo16bo$18bo2b3o2bo8bo2b3o2bo2$19b2obob2o
10b2obob2o$20bo3bo12bo3bo$20bobobo12bobobo$20b2ob2o12b2ob2o$19bo2bo2bo
2bo4bo2bo2bo2bo$20bo3bo12bo3bo$21bo2bob2o6b2obo2bo$22b3obo8bob3o$24bob
o8bobo$16bo8b2o8b2o8bo$15b2obo7bo8bo7bob2o$14b2o10bo2bo2bo2bo10b2o$17b
o3bo4b3ob2ob3o4bo3bo$17b2o7bo3b2o3bo7b2o$17bob2o4bo10bo4b2obo$16bo4b4o
12b4o4bo$17b3o22b3o$20bobo16bobo$19bo2b2o14b2o2bo$20b2o4bo8bo4b2o$23b
2ob2o6b2ob2o$23bo3b2o4b2o3bo$22bo2bo10bo2bo$23b3o10b3o$25bo10bo$26bo2b
o2bo2bo$27b2ob2ob2o$30b2o!

[velcrorex]

So here's one that's over 3000 cells long. The rle file is too big to put in a post, so the file is attached. I'm not 100% sure it's not extendable.

[Rocknlol]

So here's one that's over 3000 cells long. The rle file is too big to put in a post, so the file is attached. I'm not 100% sure it's not extendable.

What search program did you use to find that?

[velcrorex]

What search program did you use to find that?

A version of gfind.