On http://archive.develooper.com two bug reports (1, 2) show some other cool perl versions I cannot find anywhere on the web. ;) For instance the super cool version 123.0.0:

# from msg53551.html
jeffp@hut [1:00am] ~ #102> perl -w
sub foo { print "ok\n"; 123 }
do &foo;
ok
Perl v123.0.0 required--this is only v5.6.0, stopped (did you mean
v123.0.0?) at - line 2.
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