44P5H2V0

44P5H2V0
4bo5bo4b$3b3o3b3o3b$2bo2bo3bo2bo2b$b3o7b3ob$2bobo5bobo2b$4b2o3b2o4b$o 4bo3bo4bo$5bo3bo5b$2o3bo3bo3b2o$2bo2bo3bo2bo2b$4bo5bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ GPS 5 TRACKLOOP 5 0 -2/5 THUMBSIZE 2 ]]
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Pattern type	Spaceship
Number of cells	44
Bounding box	15 × 10
Direction	Orthogonal
Period	5 (mod: 5)
Speed	2c/5 | 2c/5
Heat	47.2
Kinetic symmetry	-c
Discovered by	Dean Hickerson
Year of discovery	1991
Rules Outer-totalistic rules B3/S23 – B38/S238 # of rules 22 = 4 Isotropic rules B3-ey/S2-n3-c – B34ety5aei6en7c8/S234ctz5acery6-k7e8
Glider synthesis Fewest gliders 23† Catagolue-generated RLE synthesis †Can be constructed with 15 gliders using the reverse caber tosser universal constructor.
Pattern files Plaintext 44p5h2v0.cells RLE 44p5h2v0.rle
Identifiers apgcode xq5_0sg3pnxnp3gsz4s01tve0evt10s4 Pentadecathlon ID 44P5H2V0.1 Eppstein ID 13491

44P5H2V0 is an unnamed 2c/5 orthogonal spaceship discovered by Dean Hickerson on July 23, 1991, being the first 2c/5 spaceship to be found. Robert Wainwright and David Bell then found some small tagalongs that allowed the creation of arbitrarily large 2c/5 spaceships. These were the only known 2c/5 spaceships until the discovery of 70P5H2V0 by Hartmut Holzwart on December 5, 1992.

On February 1, 2024, Keith Amling proved that it is the unique smallest period-5, symmetric, odd-width 2c/5 spaceship in terms of its minimum population of 44 cells.

Goldtiger997 found a 131-glider synthesis for 44P5H2V0 on August 29, 2020. Tanner Jacobi improved the synthesis to 41 gliders the same day, and iNoMed improved it to 39 gliders in March 2021. ENORMOUS_NAME and iNoMed constructed a 44P5H2V0 gun on October 30, 2020.

It is currently the only period-5 spaceship to have occurred semi-naturally, having first appeared in a soup found using Charity Engine on April 2, 2022. Using the recipe from this soup, a 24-glider synthesis was found by Goldtiger997 and iNoMed.

Tagalongs

Tagalongs shown in green

Its backend's obo! spark is capable of supporting tagalongs that have only a single cell in their leading edge in the iteration before forwards growth.

x = 66, y = 35, rule = B3/S23 6bobo19bobo23bobo$3bo4bo16bo4bo20bo4bo$2b3o4bo14b3o4bo18b3o4bo$bobo19b obo23bobo$2o2b2o4bo11b2o2b2o4bo15b2o2b2o4bo$b2o2b5o13b2o2b5o17b2o2b5o 4$b2o2b5o13b2o2b5o17b2o2b5o$2o2b2o4bo11b2o2b2o4bo15b2o2b2o4bo$bobo19bo bo23bobo$2b3o4bo14b3o4bo18b3o4bo$3bo4bo16bo4bo20bo4bo$6bobo19bobo23bob o$11bo21bo25bo4b2o$11bobo19bobo23bobo2b2o$10bo2bo18bo2bo2b3o17bo2bo$ 11bobo19bobo2b2o19bobo2b2o$11bo21bo25bo4b2o$6bobo19bobo23bobo$3bo4bo 16bo4bo20bo4bo$2b3o4bo14b3o4bo18b3o4bo$bobo19bobo23bobo$2o2b2o4bo11b2o 2b2o4bo15b2o2b2o4bo$b2o2b5o13b2o2b5o17b2o2b5o4$b2o2b5o13b2o2b5o17b2o2b 5o$2o2b2o4bo11b2o2b2o4bo15b2o2b2o4bo$bobo19bobo23bobo$2b3o4bo14b3o4bo 18b3o4bo$3bo4bo16bo4bo20bo4bo$6bobo19bobo23bobo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 WIDTH 560 HEIGHT 650 ZOOM 8 ANGLE 90 GPS 5 AUTOSTART TRACKLOOP 5 -2/5 0 ]]

Some tagalongs for pairs of 44P5H2V0 (first two found by Robert Wainwright, third found by David Bell) (click above to open LifeViewer) RLE: here Plaintext: here

x = 115, y = 233, rule = B3/S23 29bo2bo$6bobo20bo2bo$3bo4bo19bo4bo$2b3o4bo17bob2o$bobo21bo2b2o$2o2b2o4bo7bo3b3o4bo$b2o2b5o3bobo3bobo6bo$13bob2ob2obo2b4o$12bo$13bob2ob2obo2b4o$b2o2b5o3bobo3bobo6bo12b2o8b2o$2o2b2o4bo7bo3b3o4bo10b2o8bo2bo$bobo21bo2b2o9bob2o2b2o3b2o$2b3o4bo17bob2o5b2obo5bo5b2o$3bo4bo19bo4bo2bobobo4b4o$6bobo20bo2bo3bobo8bo$29bo2bo3b2o3bo$39b2o3$38b2o2bo2bo27bo$37b4o2bo4bo3b2o10bo7b2o$6bobo33bo2bo5b4o8b2o7bobo$3bo4bo26bob2o7b3o2bo2b3o5b2obo4bo$2b3o4bo22bob2o3bob2o8b2obob2o10b2o$bobo26b2o3bobobo4bo7b2o2b2o6bob2o$2o2b2o4bo7bo3b2o6b2o3bo17b2o5bo5b2o3bo$b2o2b5o3bobo3bobob2o5b3o2bob3o4bo13bo2b2o7bo$13bob2ob2obob2o9b10o14bo3bo3b5o$12bo12b5o27bo7bo$13bob2ob2obob2o9b10o14bo3bo3b5o$b2o2b5o3bobo3bobob2o5b3o2bob3o4bo13bo2b2o7bo$2o2b2o4bo7bo3b2o6b2o3bo17b2o5bo5b2o3bo$bobo26b2o3bobobo4bo7b2o2b2o6bob2o$2b3o4bo22bob2o3bob2o8b2obob2o10b2o$3bo4bo26bob2o7b3o2bo2b3o5b2obo4bo$6bobo33bo2bo5b4o8b2o7bobo$37b4o2bo4bo3b2o10bo7b2o$38b2o2bo2bo27bo3$29bo$6bobo18b2obo$3bo4bo17bo$2b3o4bo9b2o4bo$bobo14b3o3b2obo4b4o$2o2b2o4bo13b2ob3o3bo$b2o2b5o3bob2ob4o7b2obo$13bobo3bobob2o2b2o2bo$12bo4bobo$13bobo3bobob2o2b2o2bo$b2o2b5o3bob2ob4o7b2obo$2o2b2o4bo13b2ob3o3bo$bobo14b3o3b2obo4b4o$2b3o4bo9b2o4bo$3bo4bo17bo$6bobo18b2obo$29bo3$46bo$6bobo16b2o7bo8bo2b2o$3bo4bo12bob2o2bo4b3o7b2o5bo$2b3o4bo9b2obo7bo10b2obo$bobo13b2obob2o3bo2bobo5bobobobobob2o$2o2b2o4bo6bo9b5o6bobobob2o$b2o2b5o3bob4obo13bob3o$13bobo3b2o3bo9bo6bo$12bo20b2o$13bobo3b2o3bo9bo6bo$b2o2b5o3bob4obo13bob3o$2o2b2o4bo6bo9b5o6bobobob2o$bobo13b2obob2o3bo2bobo5bobobobobob2o$2b3o4bo9b2obo7bo10b2obo$3bo4bo12bob2o2bo4b3o7b2o5bo$6bobo16b2o7bo8bo2b2o$46bo3$34b2ob2o$6bobo24b2ob3o$3bo4bo19bo4bo2b3o$2b3o4bo8b2obo3b5ob2o3b2o$bobo14b5obo7bo$2o2b2o4bo5b2o6b3obo3b2o$b2o2b5o3bobo3b3ob2o2bo4b2o$13bobobobo8b2o$12bo3bob2o$13bobobobo8b2o$b2o2b5o3bobo3b3ob2o2bo4b2o$2o2b2o4bo5b2o6b3obo3b2o$bobo14b5obo7bo$2b3o4bo8b2obo3b5ob2o3b2o$3bo4bo19bo4bo2b3o$6bobo24b2ob3o$34b2ob2o3$38b2o2bo2bo44b2o2bo2bo$37b4o2bo4bo40b4o2bo4bo3b2o$6bobo33bo2bo12bobo33bo2bo5b4o$3bo4bo26bob2o7b3o6bo4bo26bob2o7b3o2bo2b3o$2b3o4bo22bob2o3bob2o11b3o4bo22bob2o3bob2o8b2obob2o$bobo26b2o3bobobo4bo8bobo26b2o3bobobo4bo7b2o2b2o$2o2b2o4bo7bo3b2o6b2o3bo16b2o2b2o4bo7bo3b2o6b2o3bo17b2o5bo$b2o2b5o3bobo3bobob2o5b3o2bob3o4bo8b2o2b5o3bobo3bobob2o5b3o2bob3o4bo13bo2b2o$13bob2ob2obob2o9b10o21bob2ob2obob2o9b10o14bo3bo$12bo12b5o34bo12b5o27bo$13bob2ob2obob2o9b10o21bob2ob2obob2o9b10o14bo3bo$b2o2b5o3bobo3bobob2o5b3o2bob3o4bo8b2o2b5o3bobo3bobob2o5b3o2bob3o4bo13bo2b2o$2o2b2o4bo7bo3b2o6b2o3bo16b2o2b2o4bo7bo3b2o6b2o3bo17b2o5bo$bobo26b2o3bobobo4bo8bobo26b2o3bobobo4bo7b2o2b2o$2b3o4bo22bob2o3bob2o11b3o4bo22bob2o3bob2o8b2obob2o$3bo4bo26bob2o7b3o6bo4bo26bob2o7b3o2bo2b3o$6bobo33bo2bo12bobo33bo2bo5b4o$37b4o2bo4bo40b4o2bo4bo3b2o$38b2o2bo2bo44b2o2bo2bo3$39b2o$29bo2bo3b2o3bo$6bobo20bo2bo3bobo8bo4bo$3bo4bo19bo4bo2bobobo4b4o2bobo$2b3o4bo17bob2o5b2obo5bo5b2o$bobo21bo2b2o9bob2o2b2o4bo$2o2b2o4bo7bo3b3o4bo10b2o$b2o2b5o3bobo3bobo6bo12b2o6b2o$13bob2ob2obo2b4o20bo$12bo35bobo$13bob2ob2obo2b4o20bo$b2o2b5o3bobo3bobo6bo12b2o6b2o$2o2b2o4bo7bo3b3o4bo10b2o$bobo21bo2b2o9bob2o2b2o4bo$2b3o4bo17bob2o5b2obo5bo5b2o$3bo4bo19bo4bo2bobobo4b4o2bobo$6bobo20bo2bo3bobo8bo4bo$29bo2bo3b2o3bo$39b2o2$23b2o$6bobo9b3ob3o5bo6b2o$3bo4bo9bo2bobo5b3o3b6o$2b3o4bo8b4ob2o4b3o2bo3b3o$bobo19bo2bo4b2o$2o2b2o4bo9bo2bo2b2o3b2obob2o$b2o2b5o3bobo2bobo2bobo2bo6b2o2bo$13bob2obo2bobob2ob4o4bob3o$12bo5bo3b2o17bo$13bob2obo2bobob2ob4o4bob3o$b2o2b5o3bobo2bobo2bobo2bo6b2o2bo$2o2b2o4bo9bo2bo2b2o3b2obob2o$bobo19bo2bo4b2o$2b3o4bo8b4ob2o4b3o2bo3b3o$3bo4bo9bo2bobo5b3o3b6o$6bobo9b3ob3o5bo6b2o$23b2o3$23b2o$6bobo9b3ob3o5bo9b2o$3bo4bo9bo2bobo5b3o4b2o2b3o$2b3o4bo8b4ob2o4b3o2bobo2bo2b2o$bobo19bo2bo4b2o8bo2bo$2o2b2o4bo9bo2bo2b2o3b2obo2b3o2b2o$b2o2b5o3bobo2bobo2bobo2bo7b2o2b3o$13bob2obo2bobob2ob4o5b5o$12bo5bo3b2o$13bob2obo2bobob2ob4o5b5o$b2o2b5o3bobo2bobo2bobo2bo7b2o2b3o$2o2b2o4bo9bo2bo2b2o3b2obo2b3o2b2o$bobo19bo2bo4b2o8bo2bo$2b3o4bo8b4ob2o4b3o2bobo2bo2b2o$3bo4bo9bo2bobo5b3o4b2o2b3o$6bobo9b3ob3o5bo9b2o$23b2o3$23b2o$6bobo9b3ob3o5bo9b2o$3bo4bo9bo2bobo5b3o4b2o2b3o$2b3o4bo8b4ob2o4b3o2bobo2bo2b2o$bobo19bo2bo4b2o8bo2bo2b2o$2o2b2o4bo9bo2bo2b2o3b2obo2b3o2b2o3b2o$b2o2b5o3bobo2bobo2bobo2bo7b2o2b3o4bo2b3o$13bob2obo2bobob2ob4o5b5o8b3o$12bo5bo3b2o$13bob2obo2bobob2ob4o5b5o8b3o$b2o2b5o3bobo2bobo2bobo2bo7b2o2b3o4bo2b3o$2o2b2o4bo9bo2bo2b2o3b2obo2b3o2b2o3b2o$bobo19bo2bo4b2o8bo2bo2b2o$2b3o4bo8b4ob2o4b3o2bobo2bo2b2o$3bo4bo9bo2bobo5b3o4b2o2b3o$6bobo9b3ob3o5bo9b2o$23b2o3$46bo19b2ob2o2bo$6bobo16b2o7bo8bo2b2o18b2o3b2o$3bo4bo12bob2o2bo4b3o7b2o5bo5b5o3b4ob3ob2o$2b3o4bo9b2obo7bo10b2obo8b3o2bo4b2o6b2o$bobo13b2obob2o3bo2bobo5bobobobobob2o2bo5bo14bobo$2o2b2o4bo6bo9b5o6bobobob2o5b2obobo3bo4bo7b2obo$b2o2b5o3bob4obo13bob3o13bo2bo4bob2obo$13bobo3b2o3bo9bo6bo10b3obo2b2obo11b2o$12bo20b2o17bo2bo3b2o$13bobo3b2o3bo9bo6bo10b3obo2b2obo11b2o$b2o2b5o3bob4obo13bob3o13bo2bo4bob2obo$2o2b2o4bo6bo9b5o6bobobob2o5b2obobo3bo4bo7b2obo$bobo13b2obob2o3bo2bobo5bobobobobob2o2bo5bo14bobo$2b3o4bo9b2obo7bo10b2obo8b3o2bo4b2o6b2o$3bo4bo12bob2o2bo4b3o7b2o5bo5b5o3b4ob3ob2o$6bobo16b2o7bo8bo2b2o18b2o3b2o$46bo19b2ob2o2bo2$18bo8b2o$17bo3b2ob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#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ THUMBSIZE 2 WIDTH 1120 HEIGHT 560 ZOOM 4 ANGLE 90 GPS 5 AUTOSTART TRACKLOOP 5 -2/5 0 ]]

Some of the smallest symmetrical tagalongs for 44P5H2V0 from Catagolue's ikpx2_stdin census (click above to open LifeViewer)

See also

• 30P5H2V0
• 60P5H2V0

External links

• 44P5H2V0 at the Life Lexicon
• Life (B3/S23) at David Eppstein's Glider Database
• 44P5H2V0 at Adam P. Goucher's Catagolue
• 44P5H2V0.1 at Heinrich Koenig's Game of Life Object Catalogs