The first discoveries in this order were made by Ian Gambini in 1999. Using his packing program he found two small SPSS; 50 788A and 50 1034A .
In 2014 Brian Trial found 3866 order 50 SPSSs using a new method to make SPSSs in higher orders.
In 2018 Bernard Moss found 669 order 50 SPSSs using his transforms, many made by transforming Brian Trial's 2014 discoveries.
In 2020 Bernard Moss found 13 more order 50 SPSSs.
There are 4550 known SPSSs of Order 50. Files provided as;