104P9

	104P9
	<a href="/wiki/File:104p9.png" class="image" title="104P9 image"><img alt="104P9 image" src="/w/images/1/10/104p9.png" decoding="async" width="241" height="301" /></a>
	<a href="/wiki/File:104p9.png" class="image" title="104P9 image"><img alt="104P9 image" src="/w/images/1/10/104p9.png" decoding="async" width="241" height="301" /></a>
	View static image
Pattern type	Oscillator
Number of cells	104
Bounding box	18 × 23
Period	9 (mod: 9)
Heat	31.5
Volatility	0.55 \| 0.55
Kinetic symmetry	-e
Discovered by	wwei23
Year of discovery	2020
Rules
Outer-totalistic rules	B3/S23 – B38/S23
# of rules	21 = 2
Isotropic rules	B3-ck/S2-n3 – B2i34ceq5n6ace7c8/S1c234cetw5-ijq6in7e
Pattern files
Plaintext	104p9.cells
RLE	104p9.rle
Identifiers
apgcode	xp9_8kkjap5q88q5pajkk8zx10125cc52101zxgjlk4w4kljgzwhaaqirrrriqaahzw11y611

104P9 (or p9 heavyweight emulator^{[note 1]}) is a period-9 oscillator and high-clearance sparker. It was found by wwei23 on November 15, 2020 by combining 50P9 with a partial result found using JavaLifeSearch.^[2]

On December 10, praosylen and David Raucci used this oscillator to construct a p18 R-pentomino shuttle.^[3] Raucci then used it in a p63 skewed pulsar hassler on July 19, 2021,^[4] and a smaller period-54 glider gun on September 16, 2021.^[5]

Notes

↑ This might be considered a misnomer, as the term "emulator" is sometimes understood to imply period 4.^[1]

↑ Ian07 (December 7, 2020). Message in #cgol on the Conwaylife Lounge Discord server
↑ wwei23 (November 15, 2020). Message in #cgol on the Conwaylife Lounge Discord server
↑ praosylen (December 10, 2020). Re: Thread for basic questions (discussion thread) at the ConwayLife.com forums
↑ David Raucci (July 19, 2021). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
↑ David Raucci (September 16, 2021). Re: Gun Discussion Thread (discussion thread) at the ConwayLife.com forums