Karel's p28

	Karel's p28
	<a href="/wiki/File:88p28.png" class="image" title="Karel's p28 image"><img alt="Karel's p28 image" src="/w/images/a/a8/88p28.png" decoding="async" width="153" height="153" /></a>
	<a href="/wiki/File:88p28.png" class="image" title="Karel's p28 image"><img alt="Karel's p28 image" src="/w/images/a/a8/88p28.png" decoding="async" width="153" height="153" /></a>
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Pattern type	Oscillator
Number of cells	88
Bounding box	36 × 36
Period	28 (mod: 28)
Heat	106.3
Volatility	0.97 \| 0.97
Kinetic symmetry	Unspecified
Discovered by	Karel Suhajda
Year of discovery	2007
Rules
Outer-totalistic rules	B3/S23 – B378/S238
# of rules	23 = 8
Isotropic rules	B3/S23 – B34c5k6ei78/S234c6ik7e8
Glider synthesis
Fewest gliders	46†
Catagolue-generated RLE	synthesis
Uploaded synthesis RLE	88p28_synth.rle
	†Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files
Plaintext	88p28.cells
RLE	88p28.rle
Identifiers
apgcode	xp28_y633y833zy68sq6y46qs8z33y0ca76yc67acy033zzggy0ckooycookcy0ggz11y2104emoy4ome401y211zy6ggy8ggzy611y811
Pentadecathlon ID	88P28.1

Karel's p28 is a period-28 oscillator discovered by Karel Suhajda on June 12, 2007.^[1] Other than sharing blocks, two of these oscillators can interact at two ships.

A 46-glider synthesis of this oscillator was found by Jeremy Tan on January 5, 2020.^[2]

Image gallery

Two copies of this oscillator interacting at two ships
Download RLE: click here

↑ Jason Summers' all-osc pattern collection.
↑ Jeremy Tan (January 5, 2020). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums