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If the solution in my earlier node doesn't return what you want, this surely will:
```use Math::BigInt ();

*gcd = \&Math::BigInt::bgcd;

sub embiggen {
local \$_ = @_ ? \$_[0] : \$_;
return Math::BigInt->new(\$_);
}

my @a = ( 10, 20, 33, 45, 60 );
my @b = ( 2, 5, 10, 12, 16, 23, 45 );

# my %a = map { \$_ => 1 } @a;
# my %b = map { \$_ => 1 } @b;
#
# my @c = map embiggen,
#         grep { !\$b{\$_} }
#         @a;
#
# my @d = map embiggen,
#         map { Math::BigInt->new(\$_) }
#         grep { !\$a{\$_} }
#         @b;

my @c = @a;
my @d = @b;

foreach my \$c (@c) {
foreach my \$d (@d) {
my \$gcd = gcd(\$c, \$d);
\$c /= \$gcd;
\$d /= \$gcd;
}
}

@c = grep { \$_ != 1 } @c;
@d = grep { \$_ != 1 } @d;
or this messier but potentially faster alternative:
```use Math::BigInt       ();
use Math::Big::Factors ();

*gcd    = \&Math::BigInt::bgcd;
*factor = \&Math::Big::Factors::factors_wheel;

sub embiggen {
local \$_ = @_ ? \$_[0] : \$_;
return Math::BigInt->new(\$_);
}

my @a = ( 10, 20, 33, 45, 60 );
my @b = ( 2, 5, 10, 12, 16, 23, 45 );

# my %a = map { \$_ => 1 } @a;
# my %b = map { \$_ => 1 } @b;
#
# my @c = map embiggen,
#         grep { !\$b{\$_} }
#         @a;
#
# my @d = map embiggen,
#         grep { !\$a{\$_} }
#         @b;

my @c = @a;
my @d = @b;

my %c_factors;

foreach my \$c_idx (0..\$#c) {
my @c_factors = factor(\$c[\$c_idx]);
foreach my \$c_factor (@c_factors) {
push(@{\$c_factors{\$c_factor}}, \$c_idx);
}
}

foreach my \$d (@d) {
my @d_factors = factor(\$d);
foreach my \$d_factor (@d_factors) {
next unless \$c_factors{\$d};
next unless @{\$c_factors{\$d}};

my \$c_idx = shift(@{\$c_factors{\$d}});
\$c[\$c_idx] /= \$d_factor;
\$d         /= \$d_factor;
}
}

@c = grep { \$_ != 1 } @c;
@d = grep { \$_ != 1 } @d;
Both untested.
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