Question 141
To steal a precious jewel, a thief must discover the code that allows you to open the door of the safe. The information that it has managed to steal is as follows: - the code is a number - any subsequence of consecutive digits of the code (therefore both each digit taken individually, that each pair of digits, etc. up to the whole number) represents a prime number (for example, 217 is not good, because 1 is not a first and 21 is not a prime) - code is the largest number that this property has. What is the secret code to open the safe?