Running this test program:
my $v = 123456789012345;
printf "%d %ld %u %15.0f %s\n", $v, $v, $v, $v, $v;
on my 32-bit perl 5.8 produces:
-1 -1 4294967295 123456789012345 123456789012345
So it looks like %s
are worth a shot.
Later versions of Perl on certain platforms might further
support %ll and %q (C "long long" et al type, typically 64-bit integers)
according to sprintf.
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