47575M

47575M is a methuselah with a lifespan of 47575 generations, discovered by Adam P. Goucher on February 10, 2019, using apgsearch.[1] It was formerly the longest-lasting known non-infinitely-growing methuselah to fit within a 16×16 bounding box, surpassing Homer which was discovered in November of the previous year. This title was taken by 49768M in April 2020.

47575M
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html> #O Adam P. Goucher, February 10, 2019 #C A methuselah with a lifespan of 47575 generations, found using apgsearch. x = 16, y = 16, rule = B3/S23 5b2ob2o2bob2o$2bo2bo4b3obo$o2b2obobob2o3bo$bob2o3b2o2b3o$3o8b2o2bo$bob 3o4b3ob2o$bob4obob3o$ob2obo2bo3b3o$2b4o2b4o2bo$6b2o2bobob2o$o3bo2bo2b 5o$2b4o3b7o$o2b2o2bob2ob3o$o2bo3b2o3bobo$2ob2obob8o$6o3bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] <nowiki>#C [[ ZOOM 16 THUMBSIZE 2 WIDTH 480 HEIGHT 480 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> File:47575m.png <html></noscript></canvas></div></html>
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Pattern type Methuselah
Number of cells 131
Bounding box 16×16
MCPS 132
Lifespan 47575 generations
Final population 4054
L/I 363.2
F/I 30.9
F/L 0.085
L/MCPS 360.4
Discovered by Adam P. Goucher
Year of discovery 2019

Smaller forms

On the following day, Goucher found an 18-cell form lasting 47484 generations. A few minutes later, Tanner Jacobi and Aidan F. Pierce responded with 16-cell forms each lasting three more generations.[2] Jacobi's variant, shown below, has a lifespan of 47487 generations, a bounding box of 22×17, and an MCPS of 37.

<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html> #C 16-cell variant of 47575M, originally found by Adam P. Goucher and optimized by Tanner Jacobi and Aidan F. Pierce x = 22, y = 17, rule = B3/S23 19b3o$20bo$6bo$6bo$6bo8$11bo$o10b2o$o$obo$b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ ZOOM 16 THUMBSIZE 2 WIDTH 480 HEIGHT 480 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html>
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16-cell variant of 47575M with a bounding box of 22×17
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RLE: here Plaintext: here

This 16-cell methuselah is composed of a pre-block, blinker, T-tetromino, and wing.

Stable pattern

The stable pattern that results from 47575M (excluding 57 escaping gliders) has 3769 cells and consists of 281 blinkers (including 31 traffic lights), 276 blocks, 157 beehives (including five honey farms), 52 loaves, 52 boats, 16 ships, 11 ponds, eight tubs, four long boats, one carrier, and one toad.

gollark: If the Scarlet King is unleashed, I will have to release the Crimson King™ by GTech.
gollark: Clearly *you* have been infected with SCP-033.
gollark: Er, that would be SCP-6094-1, then.
gollark: Which one is 6054-1 again?
gollark: * SCP-6052

See also

References
  1. Ian07 (February 10, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
  2. Aidan F. Pierce (February 10, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
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