SPSSs Order 59;

In 1967 Geoffrey Morley found the first 2 SPSSs of order 59.

In 1999 Ian Gambini found 2 SPSSs of order 59; 1060A and 1173A.

In 2014 Brian Trial found 5214 order 59 SPSSs.

In 2018 Bernard Moss found 983 order 59 SPSSs using a transform applied to Brian Trial's discoveries.

In 2019, 2020 Bernard Moss found 295 SPSSs in order 59, then a further 13844 in 2020, some quite small, including the six smallest found so far with sides of 887, 960, 996, 1012, 1027 and 1044. These are shown below.

There are 20340 known SPSSs of Order 59. Files provided are;

• text file spsso59.txt of tablecodes for download.
• text file spsso59.bkp of bouwkampcodes for download.
• pdf file spsso59.pdf for viewing and download.