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28P7.2 image
Pattern type Oscillator
Number of cells 28
Bounding box 12×11
Period 7
Mod 7
Heat 5.1
Volatility 0.42
Strict volatility 0.42
Discovered by Dean Hickerson
Year of discovery 1998

28P7.2 is an unnamed period 7 oscillator discovered by Dean Hickerson in 1998. In terms of its 28 cells, it is tied with oscillators burloaferimeter and 28P7.1 as the smallest known period 7 oscillator.[1] In September, 2000 Mark Niemiec and Jason Summers found a 22-glider synthesis of this oscillator.[2]


  1. "Class 2 Objects Catalog". Retrieved on March 14, 2009.
  2. Jason Summers' jslife pattern collection.

External links

  • 28P7.2 at Heinrich Koenig's Game of Life Object Catalogs