SPSSs Order 39.

There were five SPSSs of Order 39 known prior to 2013, 2 (360A, 1087A) due to Ian Gambini and 3 (863A, 1886A, 6121A) due to P.J. Federico.

James Williams found 414126 new SPSSs from order 39 in early 2013, a little later that year Milla and Anderson found 6 and Brian Trial found 367 in early 2014.

It is estimated that there are approximately 1.2 x 10^8 SPSSs in order 39.

Listings for download; postscript as Bouwkampcodes and tablecodes