Working through Project Euler, I return the result as an array of bigints, but using it as an argument for max(), map() or anything from List::Util does not work. Here's the code:

# big_factors() is my sub finding all the primes of a number.
my @result = big_factors(600851475143);
say max @result;

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I get this error, but Google has nothing for me:

Can't call method "can" on unblessed reference at 
C:/Languages/Perl/perl/lib/Math/BigInt.pm line 2693.

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Using Data::Dumper shows me the actual integers, though. I'm at a loss: how can I operate on arrays of Bigints in Perl?

Edit 1: I'm using Strawberry Perl 5.14.2 (Windows, naturally).

Edit 2: Some interesting differences in output methods:

say "@result"; ARRAY(0x3faefc) 71 839 1471 6857 say $result[1]->numify; 71

This is indeed true.

print Dumper \@result; 
$VAR1 = [
          [],
          bless( {
                   'value' => [
                                71
                              ],
                   'sign' => '+'
                 }, 'Math::BigInt' ),
          bless( {
                   'value' => [
                                839
                              ],
                   'sign' => '+'
                 }, 'Math::BigInt' ),
          bless( {
                   'value' => [
                                1471
                              ],
                   'sign' => '+'
                 }, 'Math::BigInt' ),
          bless( {
                   'value' => [
                                6857
                              ],
                   'sign' => '+'
                 }, 'Math::BigInt' )
        ];

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In reply to List::Utils can't find max in array of BigInts by mgatto

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