Karel's p15

	Karel's p15
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	<a href="/wiki/File:Karelsp15.png" class="image" title="Karel's p15 image"><img alt="Karel's p15 image" src="/w/images/6/69/Karelsp15.png" decoding="async" width="193" height="209" /></a>
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Pattern type	Oscillator
Number of cells	28
Bounding box	16×14
Period	15
Mod	15
Heat	34.9
Volatility	1.00
Strict volatility	1.00
Discovered by	Karel Suhajda
Year of discovery	2002
Rules
Outer-totalistic rules	B3/S23 only
Important rules	Conway Life
# of rules	20 = 1
Isotropic rules	B3-k/S23-ck – B2n34cjqryz5in6-ik7c/S234cjkyz5cjknr6-ac
Glider synthesis
Fewest gliders	11
Catagolue-generated RLE	karelsp15_synth.rle
Uploaded synthesis RLE	karelsp15_synth.rle
Pattern files
Plaintext	karelsp15.cells
RLE	karelsp15.rle
Identifiers
apgcode	xp15_14441xvtvz41114x757
Pentadecathlon ID	28P15.3

Karel's p15 is a period-15 oscillator discovered by Karel Suhajda on December 11, 2002.^[1] It consists of a period 15 rotor supported by the domino spark of a pentadecathlon. A pentadecathlon can support 2 Karel's p15s. It provides accessible sparks that can be used to perturb reactions. The p15 bouncer mechanism is an example. In the same month of its discovery, Mark Niemiec found an 18-glider synthesis of this oscillator.^[2]

This oscillator first appeared semi-naturally in March 2015.^[3]

Image gallery

Period 435 gun shows how this pattern thins out the glider stream and triples the period.