### 1,437-generation methuselah

Posted:

**September 20th, 2013, 11:28 am**Code: Select all

```
x = 7, y = 4, rule = B3/S23
2b3o$4bo$3o$2bo2b2o!
```

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Posted: **September 20th, 2013, 11:28 am**

Code: Select all

```
x = 7, y = 4, rule = B3/S23
2b3o$4bo$3o$2bo2b2o!
```

Posted: **September 20th, 2013, 2:13 pm**

Hmm... 1437 isn't that much for 10 cells (rabbits have a 10x longer lifespan for 9 cells), but it may be useful in some ways.

Posted: **September 27th, 2013, 5:40 pm**

On the second generation it's 9 cells.... and it would last for 1436 gens.

Posted: **September 27th, 2013, 7:23 pm**

TBH I don't think anyone is really keeping track of this kind of stuff.Rhombic wrote:This is my first attempt at a medium-lasting methuselah so don't be too hard on me Hopefully it hadn't been discovered yet.

Also, the most efficient way to make mid-range (1 to 10 kilogens) methuselahs appears to be to collide smaller methuselahs (R, B, C, pi, acorn, etc.) with small amounts of junk. These are much less likely to fizzle out than compact patterns with a similar cell count. I ran a full analysis of pi + block and pi+ blinker(which can be rewinded to 8 cells) a while ago which yielded 137 patterns that ran at least 2000 generations.

I've no idea how many compact up to 8-cell patterns that match the same there are (though this might be a completely enumerable set of patterns?) — but less than 5 have been found altogether, IIRC.