Seven-Bit Life Objects

Still-lifes | Methuselah



The 4 seven-bit still-lifes

7-bit still-lifes

Long snake; Python [4] Loaf; Burloaf [2] Eater; Eater-1; Fishhook [2] Long boat [3]

Very early on, it was discovered that the fishhook can safely eat a wide variety of things. As a result, it has been subsequently known as the Eater. Since then, other kinds of eaters have been discovered, but the eater (now also known as Eater-1 to distinguish it from other kinds of eaters), is the smallest and easiest to synthesize. It is used to stablize many oscillators. Because it has a 3-generation reset time, two of them form a simple period 3 oscillator.


4 seven-bit methuselahs

7-bit methuselahs

(2 glider) Oct- omino (@4) [2] Dove (@1); R-mango (@1) [3] Acorn [4] Multum in parvo [4]
2 Traffic lights, 4 beehives (@388) 3 Blocks and 2 blinkers (@201) Oak: Mango, 2 ponds, 5 loaves, 2 barges, 2 ships, 30 beehives, 3 ships, 8 boats, 34 blocks, 41 blinkers, 13 gliders (@5206) Block on beehive, pond, 6 loaves, toad, 28 beehives, 6 ships, 8 boats, 2 tubs, 40 blocks, 36 blinkers, 13 gliders (@3933)

Note that the minimum sizes of Acorn and Multum in parvo are the same size (7 bits), their censuses are the same size (633 bits), and both release 13 gliders, but they are totally unrelated in any other way.



Other sizes: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 and larger, not quite stable objects.

See also: Life objects sorted by: counts, frequency of occurrence, cost in gliders, name, size in bits, or type.

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This page was last updated on 2015-02-19.