Inserting a zero between adjacent digits of a number to produce a prime number

There are many examples, one such number is : 553

The factors of 553 are : 1 7 79 553

The prime factors are: 7 * 79

The factors of 5053 are : 1 31 163 5053

The prime factors are: 31 * 163

The factors of 5503 are : 1 5503

The prime factors are: 5503 is a prime number.

The factors of 50503 are : 1 50503

The prime factors are: 50503 is a prime number.