25-Bit Life Objects

Still-lifes | Pseudo-still-lifes | P2 oscillators | P3 oscillators | P4 oscillators | P4 pseudo-oscillators | P5 pseudo-oscillators | P6 oscillators | P6 pseudo-oscillators | P8 oscillators | P8 pseudo-oscillators | P10 oscillator | P10 pseudo-oscillators | P12 oscillator | P12 pseudo-oscillators | P15 oscillators | P24 oscillators | P30 oscillators | P30 pseudo-oscillators | P36 oscillators | Spaceships and pseudo-spaceships



10 25-bit still-lifes

25-bit still-lifes

Block and pre-block on Z on paperclip [10] B1 glider eater [21] B1 catalyst w/ loaf [20] Block on dock w/ curl and hand [10] Snake bridge tet on bookend [11] Carrier bridge tet on bookend [11] Paperclip w/ integral siamese very long snake [8] 25-bit still- life #2 [42] House on house bridge eater [7] 25-bit still- life #1 [9]

Bellman One (B1) is a specific eater found using Mike Playle's Bellman search program. (Actually, the name refers to the mechanism, rather than the form; the forms shown are the smallest currently known). It consists of a still-life and an eater, and is specifically designed to eat traffic-lights. A slight variant of it eats gliders instead.


2 25-bit pseudo-still-lifes

25b PP1

Up boat on docks [5] Down snake above snake bridge eater tie ship [29]


2 25-bit period 2 oscillators

larger period 2 oscillators

Test tube baby between snake and house [11] Block and down long boat on armpit [12]


2 25-bit period 3 oscillators

25-bit P3

Cuphook w/ integral w/ tail [24] Ls on table tie table on loaf [15]


The 1343 25-bit period 4 oscillators

Unfortunately, due to time limitations, these cannot yet be shown. These consist of:

The ones based on mold on a still-life are too numerous to show, but most are are easy to synthesize using standard techniques, except some that are based on 20-bit still-lifes that do not yet have syntheses. The others 75 are shown.

25-bit period-4 oscillators


2 25-bit period 4 pseudo-oscillators

All period-4 pseudo-oscillators up to 25 bits are easy to synthesize except these two, for which syntheses are also trivial, but that rely on a predecessor for which no synthesis yet exists.

25-bit pseudo-P4

Block on 21-bit P4 #1 [x+2] Block below 21-bit P4 #1 [x+3]


The 1370 25-bit period 5 pseudo-oscillators

Unfortunately, due to time limitations, these cannot yet be shown. These consist of:

All of these are easy to synthesize using standard techniques.


25-bit period 6 oscillators

There are several hundred 25-bit period 6 oscillators. Unfortunately, these have not yet been counted. Most consist of combinations of existing components.

Syntheses for 8 of these (6 still unknown) are shown; all the others should be easy to synthesize using standard techniques.

25-bit period-6 oscillators

P6 w/ table and head [x+6] P6 w/ ship and head [x+6] P6 w/ block and boat [x+7] P6 w/ carrier and head [x+12] P6 w/ boat and tub [x+11] P6 w/ beacon and head [x+7] Short key and skewed pole tie bipole [55] Bent key and skewed pole tie bipole [49]

The last two have a pseudo-period of 6, a composite of 2 and 3.


The 734 25-bit period 6 pseudo-oscillators

Unfortunately, due to time limitations, these cannot yet be shown. These consist of:

All of these except boat on blonker, and 9-bit still-life or tripole or block on boat on unix have a pseudo-period of 6, a composite of 2 and 3.

All of these are easy to synthesize using standard techniques, except these 8, for which syntheses are also trivial, but that rely on two predecessors for which syntheses do not yet exist.

25-bit pseudo-P6

Up beacon on bowed caterer [x+6] Up beacon on fire spitting [x+6] Down beacon on bowed caterer [x+6] Up beacon below bowed caterer [x+12]
Up beacon below fire spitting [x+7] Down beacon on fire spitting [x+6] Down beacon below bowed caterer [x+8] Down beacon below fire spitting [x+6]


The 18 25-bit period 8 oscillators

25-bit P8

Down blocker on down long bookend w/ long hook [15] Down blocker on dock [12] Up blocker on down long bookend w/ down boat [13] Down blocker on down long bookend w/ down boat [13] Down blocker on down table w/ gull [11] Down blocker on down long bookend w/ up boat [14]
Up blocker on down table w/ gull [13] Up blocker on down long bookend w/ up boat [14] Down blocker on up long bookend w/ long hook [15] Up blocker on down long bookend w/ long hook [15] Up blocker on dock [12] Down blocker on up long bookend w/ down boat [13]
Down blocker on up table w/ gull [11] Down blocker on up long bookend w/ up boat [14] Up blocker on up long bookend w/ long hook [17] Up blocker on up long bookend w/ down boat [15] Up blocker on up table w/ gull [13] Up blocker on up long bookend w/ up boat [16]


The 176 25-bit period 8 pseudo-oscillators

Unfortunately, due to time limitations, these cannot yet be shown. These consist of:

All are easy to synthesize using standard techniques.


The 1 25-bit period 10 oscillator

25b P10

Pseudo- barber- pole tie quadpole [41]

This has a pseudo-period of 10, a composite of 2 and 5.


The 89 25-bit period 10 pseudo-oscillators

Unfortunately, due to time limitations, these cannot yet be shown. These consist of:

All of these have a pseudo-period of 10, a composite of 2 and 5

All of these are easy to synthesize using standard techniques.


The 1 25-bit period 12 oscillator

25-bit P12

Jam tie mold [17]

This has a pseudo-period of 12, a composite of 3 and 4.


The 4 25-bit period 12 pseudo-oscillators

25-bit P12 pseudo-oscillators

Up mold above jam [13] Up mold beside jam [13] Down mold above jam [13] Down mold beside jam [13]

All of these have a pseudo-period of 12, a composite of 3 and 4.


The 3 25-bit period 15 oscillators

Unfortunately, due to time limitations, these cannot yet be shown. These consist of:

Syntheses for 3 of these are shown; all are easy to synthesize using standard techniques.

25-bit period 15 oscillators

Penta- decathlon and up jam sharing sparks [11] Penta- decathlon and down jam sharing sparks [11] Silver's P5 on eater eating eater [19]

This last one has a pseudo-period of 15, a composite of 3 and 5.


The 4 25-bit period 24 oscillators

24-bit P24 oscillators

Up figure-8 and up jam sharing sparks [14] Down figure-8 and up jam sharing sparks [14] Up figure-8 and down jam sharing sparks [11] Down figure-8 and down jam sharing sparks [11]

All of these have a pseudo-period of 24, a composite of 3 and 8.


The 8 25-bit period 30 oscillators

25-bit period 30 oscillators

Princess bee, Queen bee between cis close eaters [7] Queen bee between block and down close integral w/ hook [9] Queen bee between block and up close integral w/ hook [9] Trans buckaroo w/ integral; Queen bee between block and down integral [8]
Cis buckaroo w/ integral; Queen bee between block and up integral [8] Queen bee between trans close eaters [7] Queen bee between block and down close integral w/ tub [8] Queen bee between block and up close integral w/ tub [8]


The 82 25-bit period 30 pseudo-oscillators

Unfortunately, due to time limitations, these cannot yet be shown. These consist of:

All of these are easy to synthesize using standard techniques.

All of these except the ones with queen bees have a pseudo-period of 30, a composite of 2 and 15.


The 2 25-bit period 36 oscillators

25-bit P36

Elkies's Integral w/ hook and eater hassling two T tetrominos [11] Elkies's Integral w/ tub and eater hassling two T tetrominos [10]


The 6 25-bit spaceships

25-bit spaceships

Crab; Quarter [x] LWSS on HWSS #7 [7] LWSS on HWSS #8 [7] MWSS on HWSS #9 [7] 25-bit c/3 orthogonal spaceship #1 [x] 25-bit c/3 orthogonal spaceship #2 [x]

The Crab has a period of 4 and a diagonal velocity of c/4. It moves one cell up and flips diagonally every two generations, effectively moving one cell up and left every 4 generations.

The next three have a period of 4 and an orthogonal velocity of c/2. They move two cells up every 4 generations. The middle one is actually a pseudo-spaceship, rather than an actual spaceship.

The last two have a period of 3 and an orthogonal velocity of c/3. They move one cell up every 3 generations.



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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Copyright © 1997, 1998, 1999, 2013, 2014 by Mark. D. Niemiec. All rights reserved.
This page was last updated on 2015-02-19.