In 1999 Ian Gambini found the first SPSSs of order 57. He published 2 small SPSS of order 57 : 985A I_G 1999, 56 : 1122A I_G 1999
In 2014 Brian Trial found 5432 order 57 SPSSs.
In 2018 Bernard Moss found 958 order 57 SPSSs using a transform applied to Brian Trial's discoveries.
More recently Bernard Moss found thousands more SPSSs in order 57, some quite small, including the three smallest found so far with a sides of 817, 864 and 984. These are shown below.
There are 10186 known SPSSs of Order 57. Files provided as;