These file list each 12-crossing projection obtained from
projections of each of the 1288 prime alternating 12-crossing
knots, by changing every subset of the crossings and using 
Knotscape's "knotfind" program to identify them. This process
failed (or rather, timed out) for no projections; the file
"13_error.txt" contains only blank lines.

These files separate out all of the resulting knot projections,
according to the crossing number of the underlying knot 
(as reported by knotfind); the file "12_connsum.txt" contains
all knots reported to be a connected sum. Note that the 
DT codes for the summands reported in "12_connsum.txt" are
not (necessarily) the `canonical' DT codes that Knotscape
uses, and, in fact, the reported crossing number is 
sometimes *not* the actual crossing number of the underlying 
knot.