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I should add a note somewhere about arks and why they often aren't considered methuselahs even though they take a LONG time to stabilize. I'll do that after I add the ark article. Nathaniel 16:18, 9 February 2009 (UTC)

Don't know if this is known, but arks are puffers, and puffers are not considered methuselahs, since they don't stabilize in the normal sense. FractalFusion 06:04, 28 March 2009 (UTC)
My original comment wasn't too clear, but I was more referring to mutually-stabilizing ark "methuselahs" that you get by starting two of them really far away but aimed towards each other so that they will collide and stabilize after something like a million generations (as long as you want, really). Though they can start with very few cells and last for arbitrarily-long, their bounding box is of course ridiculously huge and they're not particularly interesting, so people generally ignore them when talking about methuselahs. Nathaniel 10:53, 28 March 2009 (UTC)

Two RLE's of extremely long lived methuselahs I found in Golly.

  1. ark1 -- 16 cells, stabilizes at 736692 gens, found by Nick Gotts.

x = 32, y = 29, rule = B3/S23 27bo$28bo$29bo$28bo$27bo$29b3o20$oo$bbo$bbo$3b4o!

  1. ark2 -- 19 cells, stabilizes at 8120878 gens, found by Nick Gotts.

x = 53, y = 44, rule = B3/S23 50b3o28$12bo$12bo$13boo$15bo$15bo$15bo$15bo6$oo$bbo$bbo$3b4o!

-wwei23 12:10AM 9/19 2015

Arks are their own species. Codeholic (talk) 09:55, 19 September 2015 (UTC)

I don`t understand. -wwei23 9:49AM 9/19/2015 NY time

Actually they were in the Methuselah folder. -wwei23 1:37PM 9/20/2015 NY time


I've reverted the edit about the higg methuselah, because it isn't notable. It surely isn't newly discovered as computer searches have enumerated all patterns with less than 20 or so cells within small (<= 6x6 or so) bounding boxes. Nathaniel 04:28, 22 March 2009 (UTC)


I know that this sounds irrelevant, but it already takes 9 generations to stabilize, and is the closest 4-cell pattern to a methuselah. Indeed, add a single cell, and you get the R-pentomino. The R-pentomino can have additional cells added to get century, the >hexomino, and B-heptomino. I hope I`m right! -wwei23 10:15AM 9/19/2015 NY time


I found a parent of 40514M! It therefore runs for 40515 generations.

x = 78, y = 54, rule = B3/S23 75b3o21$o$o$o20$b3o6$9bo9b2o$9bo10b2o$9bo9bobo2$20bo!

-wwei23 4:57PM 9/24/2015 NY time