47575M

47575M
#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 ]] #C [[ ZOOM 16 THUMBSIZE 2 WIDTH 480 HEIGHT 480 ]]
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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
Pattern files RLE 47575m.rle

47575M is a methuselah with a lifespan of 47575 generations, discovered by Adam P. Goucher on February 10, 2019, using apgsearch. It is currently the longest-lasting known methuselah to fit within a 16×16 bounding box, surpassing Homer which was discovered in November of the previous year.

Smaller forms

On the following day, Adam P. Goucher found an 18-cell form lasting 47484 generations, below. In a few more minutes, Tanner Jacobi and Aidan F. Pierce responded with 16-cell forms lasting three more generations.

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.

See also

• List of long-lived methuselahs

External links

• 47575M at Adam P. Goucher's Catagolue