NW31073100000701010700310100013100070101070000310731H

That's where 666 comes from: it is 7^3-1=342 in base 7. Although Golly rulestrings are decimal, it is easier to memorize, for example, that survival of two immediate neighbors plus three edge neighbors plus five range-2 neighbors is 7-base 532 rather than 268. 666 (base 7) in the highest possible neighbor number,
Besides regular photons, we can have "hyperphotons", such as these ones in explosive rules that resemble Seeds:
Code: Select all
x = 11, y = 11, rule = R2,C0,S,B14,56,NW31073100000701010700310100013100070101070000310731H
4$4b2o$3bo3bo!
Code: Select all
x = 12, y = 12, rule = R2,C0,S,B56-57,NW31073100000701010700310100013100070101070000310731H
3$3b2o2$3bo2bo!Code: Select all
x = 8, y = 9, rule = R2,C0,S0,B56-57,NW31073100000701010700310100013100070101070000310731H
3$2b2o$4bo!Here is one with stable splitters that can be used as guns:
Code: Select all
x = 145, y = 136, rule = R2,C3,S0,7,14,49,98,112,B56,99,NW31073100000701010700310100013100070101070000310731H
9$48.A$44.A$50.A4$52.A$44.A26.A$56.A$44.A30.B$58.A16.B$85.A2$46.A40.A
2$44.A$64.A$44.A10.A.A.A.A27.A$55.A.B2.B.A$57.B.A.B31.A2$55.A.A5.A.A
29.A6$78.A$77.B.A$78.B2$96.2B$85.A$92.A4.2A$85.A3.B$90.B3$87.A$58.2B$
85.A$59.2A48.A$85.A2$61.A27.2B$24.A$29.A27.A.A5.A.A22.2A12.A$24.A3.B.
A$29.B70.A.A5.A.A3$26.A2$24.A2$24.A2$28.2B2$29.2A6$55.A$55.A.B$57.B
10$38.A3$107.2B2$108.2A$91.A$91.A.B$93.B5$120.A5$115.A2$111.A.A5.A.A!
Code: Select all
x = 78, y = 84, rule = R2,C3,S0,7,14,49,98,112,B56,99,NW31073100000701010700310100013100070101070000310731H
14$14.A$10.A51.A$16.A42.B$60.B2$16.A$18.A$10.A5.B37.A$17.B.A2.A30.B.A
$10.A43.B$24.A2$13.A$12.A35.A$15.B31.B.A$10.A2.A.B32.B$23.2B5.A$10.A$
23.A2.A$25.A16.A$41.B.A$21.A.A5.A.A10.B2$16.2B2$17.2A17.A$35.B.A$36.B
4$30.A10.A$29.B.A14.A$30.B10.A2$22.2B$44.A$23.2A18.A$25.A20.B5.A$25.A
.B13.A2.A.B$27.B26.A$41.A2$54.A$37.A18.A$37.A.B14.B$39.B15.B.A2.A$47.
2B$62.A$47.A2.A$49.A2$45.A.A5.A.A5.A!Code: Select all
x = 26, y = 23, rule = R2,C3,S1,8,B9,50-51,NW31073100000701010700310100013100070101070000310731H
2$4.A8.ABA$3.A.B$3.ABA8.ABA$5.A$4.ABA$4.B.A12.A$5.A13.B.A$19.A.B$21.A
7$16.2A$15.A.B2AB$16.BA.B.A$19.2A!Code: Select all
x = 49, y = 56, rule = R2,C3,S1,9,B9,50-51,NW31073100000701010700310100013100070101070000310731H
6$20.A$19.AB$13.A6.B$14.A6.B$14.AB6.A$15.A$15.AB3.AB$16.A.B$10.BA8.B$
20.A$11.BA2$22.2B.A$25.B$18.3A2.2B.A6$30.A2.A$22.B5.BA.B.B$29.A2.2B2$
26.B4.B2.B$32.A.A$35.A$17.AB11.B4.BA$30.A3.BA$18.AB14.2A$30.A.B$31.B
2.BA$21.A10.A$22.B11.ABA$20.ABA$19.AB10.A$20.B2.BA5.A.B$20.AB2.B6.B$
24.BA$22.ABA$22.B$23.A!Code: Select all
x = 173, y = 132, rule = R2,C3,S100-342,B9,50-51,NW31073100000701010700310100013100070101070000310731H
10$9.A$10.B3.A$11.5A.A$17.2A.A$11.4A2.A.A$17.A.2A$11.5A.A2.A$14.A.A$
11.A.A$14.A.A$13.A.A2B38$126.AB8.A$133.A2.B$108.4A14.B2.A.A.4A$106.AB
A.A12.BA.A$110.2A.A2.A.A2.ABA.A3.A.3A.3A$99.B7.A2.A.A13.A.A$97.A.3A.
2A2.2A.2A4.4A.A.A.A.A3.2A.A.2A$121.A.A2.A3.A3.A2.A$97.2A.5A4.3A.2A2.
2A.2A7.4A.A4.B$100.A.A3.A.A12.A.A.A2.A.A$97.2A.A2.4A.4A.2A4.A3.4A.2A.
3A.A$102.A.A.A.A.A3.A6.A.A7.A.A$68.A28.A.5A2.A.2A4.A.A4.A.2A2.9A$67.A
.B29.A.A2.3A.A5.A.A2.A6.A6.A.A$68.B30.A2.2A.A2.2A6.A.3A.3A.A.10ABA$
99.A.A3.3A2.A2.B2.A.2A.2A3.A.A6.A$98.A4.A.4A.2A.2A2.6A3.2A3.A.A2.2A$
98.BA.A.A.2A2.A.2A5.A.A.6A.A3.A.A$105.A.4A.2A.A3.A2.2A.5A3.A.A$99.A.A
4.3A2.4A3.A.A.A4.A.A5.A$103.A.A6.5A.2A.3A.8A.4A$98.2BA.A2.A.A10.A.A8.
A3.A.A.2A$99.A3.A.A.4A.A.3A3.A.A.2A.2A.A.2A.2A$96.A5.A.A2.A4.A7.A10.A
3.A$97.A.A.2A3.2A.2A.A3.A.A.A.A11.4A$98.A.A.A21.5A4.A.A.2A$97.A.A.6A.
2A2.A.2A.A.2A.A6.A.A4.A$97.2A.A11.A3.A9.5A$98.2A.A.2A3.5A.A.7A.2A5.A.
A$104.BA3.A2.A.A.3A7.A3.3A.B$113.A.A.A2.3A.2A.A$116.4A5.A2.A2.2A3.A$
104.2AB6.A.A.A6.A3.5A.A.B$88.A5.BA7.A.B.A.2A.A.A10.A2.A.2A.A$89.B.B9.
3A5.A3.A.A7.BA.3A2.4A$90.B2A4.B11.A2.3A.A.A4.A6.A.2A$98.A.2A.A.A.A.A.
A.A.A.A.A3.2A.A3.A.A$100.A.A.A8.3A.2A8.4A.A$100.A8.A.A4.A.5A3.A3.A$
100.A.A.A4.2AB5.2A.A7.2A$92.B5.A.4A14.A2.6A3.A$100.A23.A3.A3.A$96.B.A
.4A.A17.A.A.A.2A.A$96.2AB.A.A2.A18.A.A.A3.A.A$103.A.A21.A.4A$106.A$
106.B$107.B$108.A!Code: Select all
x = 16, y = 9, rule = R2,C3,S100-342,B9-13,50-55,NW31073100000701010700310100013100070101070000310731H
2$5.B$3.ABAB.A$4.A3.2BA$3.A.A.A$4.A.2A!Code: Select all
x = 62, y = 123, rule = R2,C3,S147-342,B56,NW31073100000701010700310100013100070101070000310731H
10$13.A.A2$13.A.A.A2$15.A.A3.B$19.A.B$23.A.A$21.A$23.A.A.A2$25.A.A$
21.2A2$22.2B21$26.A.A$33.2A$22.A.A.A.A.A.A$32.A.2B$22.A.A3.A.A2$24.A.
A.A.A2$28.A.A5$39.2A2$40.2B10$45.2A2$46.2B2.A.A2$50.A.A.A2$45.B2.B3.A
.A.A$48.B$43.A5.B4.A.A$42.B3.A$45.B.A3.A2.B$40.A5.B3.B$39.B3.A$42.B.A
3.A$37.A5.B3.B$36.B3.A$39.B.A3.A$34.A5.B3.B$33.B3.A$36.B.A3.A$31.A5.B
3.B$30.B3.A$33.B.A3.A$28.A5.B3.B$27.B3.A$30.B.A3.A$25.A5.B3.B$24.B3.A
$27.B.A3.A$22.A5.B3.B$21.B3.A$24.B.A3.A$19.A5.B3.B$16.A.A3.A$21.B.A3.
A$16.A.A.A.B3.B$19.A.A$18.A.A3.A$17.A.A.A.A2$21.A.A$20.B!Code: Select all
x = 155, y = 82, rule = R2,C3,S1,3-7,B9,50-51,NW31073100000701010700310100013100070101070000310731H
8$24.A$20.2A2.B3.3A$19.A3B.B$21.2A2.B3.3A$26.A$22.A.A$21.A4BA$23.A.A$
35.AB$27.2A3.AB$26.A3BA2.BAB$28.2A12.A$16.B24.AB$13.B28.B$20.B22.B$
118.A$119.BA$44.B74.ABA$23.B96.AB$42.A74.B4.A$13.B26.B.B.A$44.A$44.A$
118.B$16.B$23.B96.B8.A$20.B103.2A4.BA$130.AB$128.BA2.BA$128.AB2.AB$
130.BA2.A$128.A.AB$127.AB$128.BA$127.AB2.AB$128.BA2.BA$128.A2.AB$132.
BA$132.A!Code: Select all
x = 7, y = 8, rule = R2,C0,S1,B50-51,NW31073100000701010700310100013100070101070000310731H
2$3bo$3bo2$3bo!Code: Select all
x = 33, y = 34, rule = R2,C0,S64,113,120,127,B3,5,54,57,99,103,106,148,155,NW31073100000701010700310100013100070101070000310731H
3$24bo$23bobo$22bob2o$21bob2o$22b2o2$18bo$17bobo$18b2o$17bo$14bobobo$
13bobob2o$14b2o2$10bo$9bobo12bo$10b2o11b2o$22bo$21b2o3$18bo$17b2o!
Code: Select all
x = 25, y = 28, rule = R2,C0,S0,6,64-66,113,120,127,B3,5,14,54,57,99,103,106,148,155,NW31073100000701010700310100013100070101070000310731H
8$8bo2$12bo$8bo2$12bo!