Hat

Hat is a 9-bit still life that was discovered independently in 1971 by several Life enthusiasts and named by Charles Corderman.[1][2]

Hat
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Pattern type Strict still life
Number of cells 9
Bounding box 5×4
Frequency class 15.3
Discovered by Unknown
Year of discovery 1971

It (as well as similar still lifes such as table on table) can be used as an eater (in particular, a rock) stabilizing the twin bees shuttle. The mechanism has some similarities to snake-type eaters.

The loop and eleven loop can be seen as the long and long long versions of the hat. Orthogonally lengthened versions of the hat are also possible still life components (a long³ version appears in Cthulhu), though they are not still lifes of their own.

Commonness

Hat is the twenty-fifth most common still life in Achim Flammenkamp's census, being less common than trans-boat with tail but more common than boat-ship-tie.[3] It is also the thirty-third most common object on Adam P. Goucher's Catagolue.[4]

gollark: So I'm using it on a big number which it is not optimized for.
gollark: > Factoring large numbers is, in general, hard. The Pollard-Brent rho algorithm used by factor is particularly effective for numbers with relatively small factors. If you wish to factor large numbers which do not have small factors (for example, numbers which are the product of two large primes), other methods are far better. Oh bee.
gollark: This is the GNU coreutils one.
gollark: I'll check.
gollark: > `osmarks@fenrir ~> factor 260976178038066787831979074792050799823255192602588911719914752521213497360584746844430`This is taking an ominously long time.

See also

References
  1. Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
  2. Robert Wainwright. "Lifeline Volume 2".
  3. Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
  4. Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
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