Well, you forget the condition that the program should be compilable, and, when run, should print "Just another Perl Hacker", (with or without a trailing newline/comma, and with some variation in capitalization). That will drop the number. However, since you can have:

print"Just another Perl Hacker"
[download]

(31 characters), you have 4 * 79 - 31 == 285 characters you can use inside comments. If we restrict them to printable characters, that leaves you with 191 characters from the ISO-LATIN-1 character set to use. That will give you:

12431103020403707107438586374215251314062231402740033846271848553839\
64794897942768614366472495245162250622773403971143769094322237777997\
22224034424993652821949360607589486799938766556351642250055325548582\
31176161943484446303420510949249800299598113919038030677551444922891\
92170940375333669061892360087978683497677025806119812237326648034654\
87178777460593657834903959884176099504825209804921507278509975772023\
74764012796271389737610771093408198946475108846474664241214900907612\
62862081852957499464585817808664830865775651649173215474773373760082\
25416891017755307073167219366790883957292361415401836384029334901914\
070048752861187584482256205393168201151

different JAPHs of exactly 4 x 80. Which is about 10**650.