# A Late Night Conversation

**Computer Science**Level 5

She: Why aren't you replying for last two minutes?

Me: My computer just stopped responding.

She: Isn't that just an excuse to not talk to me?

Me: No, dear. I just calculated that <LargePrimeX> + <LargePrimeY> = <YourPhoneNumber> where <LargePrimeX> and <LargePrimeY> are prime numbers.

She: You do all these up so late?

Me: Yup...

She: Had it been any other girl, she'd have gone mad. Only because it's me, I've been in sound mental health for so long!

I recently realised that the last four digits of her phone number can be expressed as a sum of two primes in 103 ways.

What is the maximum possible value of the last four digits of her phone number?

**Details and Assumptions:**

PrimeA + PrimeB and PrimeB + PrimeA are counted as the same solution.

The primes need not be distinct.

22 can be written as a sum of two primes in three ways.

**Your answer seems reasonable.**Find out if you're right!

**That seems reasonable.**Find out if you're right!

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