b29_synthOriginal 54-glider synthesis found by Tanner Jacobi, 5 April 2015. Incremental reductions by Martin Grant, Matthias Merzenich, and Tanner Jacobi. Current 25-glider synthesis completed 21 January 2016. https://conwaylife.com/forums/viewtopic.php?f=2&t=1557&p=18531#p18531 https://conwaylife.com/forums/viewtopic.php?f=2&t=1452&p=26897#p26897 https://conwaylife.com/wiki/B29