$"x=$%="@ARGV";$~=$;='(  +)';while($%>>$:++){if($"=~/$~$/^$"=~/$;$/){$
|=$?=$:>2||die"prime\n";eval"print length(\$$?)".($:>++$?&&"/length(\$
$?).'*'")while$:>$?;die$/}$;=$~;$~=~s~.*~^($&\\1+)~;$~=~s;\d+;1+$&;eg}

##</code><code>##

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 10000
2*2*2*2*5*5*5*5

real    0m4.001s
user    0m3.977s
sys     0m0.015s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 32767
7*31*151

real    0m6.891s
user    0m6.832s
sys     0m0.031s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 32768
2*2*2*2*2*2*2*2*2*2*2*2*2*2*2

real    2m50.119s
user    2m49.588s
sys     0m0.015s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 32769
3*3*11*331

real    0m13.282s
user    0m13.213s
sys     0m0.015s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 65535
3*5*17*257

real    1m11.228s
user    1m8.422s
sys     0m0.061s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 65536
2*2*2*2*2*2*2*2*2*2*2*2*2*2*2*2

real    22m20.875s
user    20m55.277s
sys     0m0.920s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 65537
prime

real    0m0.903s
user    0m0.842s
sys     0m0.031s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 65538
2*3*3*11*331

real    1m40.633s
user    1m40.183s
sys     0m0.077s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 100000
2*2*2*2*2*5*5*5*5*5

real    20m59.463s
user    20m53.998s
sys     0m0.202s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 100003
prime

real    0m2.090s
user    0m2.043s
sys     0m0.046s

Kevin@muzyx /cygdrive/c/users/kevin
$ time perl lol.pl 1000003
prime

real    3m23.670s
user    3m22.411s
sys     0m0.062s

##</code><code>##

for$b(-25..25){for$a(-50..29){$x=$a/21;$y=$b/15;print$b?chr:chr^chr
ord(substr'<6C}'.1x29 .'[FDEq2?@E96Cqa6C=q924',$a)-49;$_=30;($y,$x)
=(2*$x*$y+$b/15,$x*$x-$y*$y+$a/21)while$x*$x+$y*$y<9&$_++<95}$_=10}