I was checking this number theory exercise:
The numbers $11, 13, 17, 19$ are four odd integers ending in $1, 3, 7, 9$ that lie between two multiples of $10$. Find the next such set of prime numbers ending in $1, 3, 7, 9$.
By trying several numbers I found the answer is $101,103,107,109$ but I have been unable to find such numbers by a mathematic approximation or a different way.
If you have another way it will be really appreciated.