Location: The Quad

The information about the Frosty Keypad acn be found by talking to Tangle Coalbox. This is summarized as:

Hint

I've got a few clues for you.

1. One digit is repeated once.
2. The code is a prime number.
3. You can probably tell by looking at the keypad which buttons are used.

So looking at the picture of the keypad we can see that 1, 3 and 7 are the most smudged from use. This implies 3 number, but one is repeated once, so the code is 4 digits long and a prime number. I found a list of prime numbers up to 10,000 and put them into a small perl program:

``````#!/usr/bin/perl

use strict;
use English;

my \$primes="2, [SNIPPED FOR CLARITY], 9973";

foreach my \$prime ( split(", ", \$primes)){
my @digits = split("", \$prime);

if( \$#digits == 3) {
my \$count_1 = 0;
my \$count_3 = 0;
my \$count_7 = 0;
my \$count_other = 0;
foreach my \$digit (@digits) {
if( \$digit == 1 ) {
++\$count_1;
} elsif ( \$digit == 3 ) {
++\$count_3;
} elsif ( \$digit == 7 ) {
++\$count_7;
} else {
++\$count_other;
}
}
next if( \$count_other > 0 );
next if( \$count_1 > 2 || \$count_3 > 2 ||\$count_7 > 2 );
next if( \$count_1 == 0 || \$count_3 == 0 ||\$count_7 == 0 );
print "\$prime\n";
}
}
``````

The result was the following list:

1373

1733

3137

3371

7331

The answer was 7331.