Use 5 numbers of 1, 2, 3, 4, 5 to form a five-digit number, so that the sum of any adjacent numbers of this five-digit number is a prime number. What is the smallest five-digit number?
用1，2，3，4，5这5个数字组成一个五位数，使得这个五位数的任意相邻数字的和都是质数．这个五位数最小是多少．
<result>14_325</result>