46P4H1V0 is an unnamed c/4 orthogonal spaceship discovered by Tim Coe in May 1996. It was the smallest known c/4 orthogonal spaceship until the discovery of 37P4H1V0.
It was the first c/4 spaceship for which a complete glider synthesis was found, by Tanner Jacobi and Martin Grant on Febuary 4, 2019 with 105 gliders. This was later reduced to 89 gliders with a repeat time of 613 ticks due to optimizations by various people. However, a slightly different synthesis using 95 gliders is also known with a repeat time of only 604 ticks.
- 46P4H1V0.1 at Heinrich Koenig's Game of Life Object Catalogs