Net::IP convert ip to int

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Dear monks,

I've the code below to try and get the integer value of an IP.

my $netip = new Net::IP ($ip) or die (Net::IP::Error());
my $intip = $netip->intip();
# output $intip
# bless( { 'value' => [ 5050079, 291 ], 'sign' => '+' }, 'Math::BigInt
+' );
[download]

What does the second number 291 represent? I've run the code with different IPs and it seems similar ips have slightly different first integer values but the same second value.

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