84P199

84P199
x = 52, y = 45, rule = B3/S23 16b2o16b2o$16b2o7b2o7b2o$25b2o5$2o48b2o$2o48b2o3$18bo14bo$18b3o10b3o2$ 19b3o8b3o5$8b2o32b2o$8b2o32b2o4$8b2o32b2o$8b2o32b2o5$19b3o8b3o2$18b3o 10b3o$18bo14bo3$2o48b2o$2o48b2o5$25b2o$16b2o7b2o7b2o$16b2o16b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ LOOP 199 GPS 20 THUMBSIZE 2 HEIGHT 600 WIDTH 600 ]]
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Pattern type	Oscillator
Number of cells	84
Bounding box	52 × 45
Period	199 (mod: 199)
Heat	90.5
Volatility	0.98 | 0.98
Kinetic symmetry	Unspecified
Discovered by	Mitchell Riley ljkiernan1 iNoMed
Year of discovery	2022
Rules Outer-totalistic rules B3/S23 only # of rules 20 = 1 Isotropic rules B3/S23 – B3/S236i
Glider synthesis Fewest gliders 35† Catagolue-generated RLE synthesis †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext 84p199.cells RLE 84p199.rle
Identifiers apgcode xp199_yc33y366y333zccyzy5cczye6kkgy4gkk6zy4ggysggzy4hhyshhzy411ys11zyec551y4155cz66yzy566zycooy3ccy3oo

84P199 (or p199 R-pentomino hassler) is a period-199 oscillator found by Mitchell Riley and ljkiernan1 on July 6, 2022 using a symmetric variant of CatForce. While its original 248-cell form (using eater 4 as a catalyst) does not produce any useful sparks, its reduced form with 200 cells (shown in reference), in addition to later versions, happens to function as a pipsquirter. Despite having relatively low clearance, the spark can still be used to form LCM oscillators. It has since been reduced to its 104-cell form and then to 84 cells. It is currently the highest known prime-period oscillator that does not rely on glider or signal loops, surpassing 74P127 which was discovered just four days earlier.

External links

• 84P199 at Adam P. Goucher's Catagolue