Edna

Edna is a methuselah with a lifespan of 31192 generations, discovered by Erik de Neve on January 10, 2010, using Nathaniel Johnston's soup search script,[1] being the first such pattern to be found with a longevity greater than that of Lidka. At the time, it was the second longest-lived known methuselah to fit within a 20×20 bounding box after Fred, but new patterns which last longer, such as Wilma, have now surfaced.

Edna
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 20, y = 20, rule = B3/S23 2bo2bo2bo5bo4bo$2b2o4bo2bo2b2obo$b4ob2ob4obobobo$2obo5b2ob2o2b3o$8bo2b o2b3o$3ob2o3bo2bo2bo3bo$b4o5bo2b3o2b2o$obo2bo3bo5bobo$2obob2ob3obo$2bo 2b2o5bobo2bobo$2o2bobob2o3bo2b2o$4bobo3bobo4b2o$bo2bobo4bo2b2o$3o3bo3b o4b4o$2ob2o6bo4bo2bo$5bo3bobo6b2o$6bo2bo5bobo$8bo2bo2bobo$2b4obo2bob2o 5bo$ob2o2bo6b2ob3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] <nowiki></nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
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Pattern type Methuselah
Number of cells 149
Bounding box 20×20
MCPS 157
Lifespan 31192 generations
Final population 3602
L/I 209.3
F/I 24.2
F/L 0.115
L/MCPS 198.7
Discovered by Erik de Neve
Year of discovery 2010

The pattern is named after Methuselah's wife, Edna.

Stable pattern

The stable pattern that results from Edna (excluding 58 escaping gliders) has 3312 cells and consists of 231 blocks, 229 blinkers (including 20 traffic lights), 140 beehives (including six honey farms), 50 boats, 50 loaves, 12 ponds, 11 ships, 11 tubs, two long boats, one barge, one eater 1, one mango, one ship-tie, and one toad.

  • A 26-cell form of Edna with lifespan 31082
    RLE: here
  • Generation 31192 of Edna (excluding escaping gliders)
gollark: But implementing page aliases and better link case insensitivity would be quite difficult and either be slow or require two pass rendering.
gollark: Anyway, running minoteaur ""at scale"" has shown me that people actually do want "index/recent changes/general purpose discovery thing", so I need to work out how to do that decently, and also the case-insensitivity thing works poorly in some situations and people want aliases/redirects.
gollark: Fascinating.
gollark: It would be unethical (due to endianness apioforms) to just *cast* it.
gollark: It seems to be something something unpacking integer from array of bytes.

See also

References
  1. Matthias Merzenich (January 10, 2010). Re: The Online Life-Like CA Soup Search (discussion thread) at the ConwayLife.com forums
  • Edna on Nathaniel Johnston's blog
  • Edna on Erik de Neve's blog (archived from the original)
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