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-rwxr-xr-xchallenge-191/jo-37/perl/ch-2.pl2
1 files changed, 2 insertions, 0 deletions
diff --git a/challenge-191/jo-37/perl/ch-2.pl b/challenge-191/jo-37/perl/ch-2.pl
index 3d7c4c86fa..aca77d20f0 100755
--- a/challenge-191/jo-37/perl/ch-2.pl
+++ b/challenge-191/jo-37/perl/ch-2.pl
@@ -70,6 +70,8 @@ say count_cute(shift, $permanent);
# best of these attempts (that has more than twice the running time
# compared to the B-B-F-G implementation).
#
+# NB2: What a shame! wxMaxima finds the solution for N=28 in 5 min.
+#
# References:
# [1] http://oeis.org/A320843
# [2] https://en.wikipedia.org/wiki/Permanent_(mathematics)