p58 pre-pulsar shuttle is a period-58 shuttle oscillator discovered by Tanner Jacobi on April 25, 2015 and is the smallest known oscillator of that period. The previous record holder was the Snark-based period 58 glider loop.

Jeremy Tan and iNoMed found a glider synthesis for a stator variant of this oscillator in July 2021. Tan later found a 188-glider synthesis for the canonical version on September 11, 2021.

Blue 25%
Green 20%
Orange 17%
Red 13%
Purple 12%
Cyan 8%
Yellow 4%
White 1%