- #1

Char. Limit

Gold Member

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## Main Question or Discussion Point

I was playing with Wolfram|Alpha, and I typed in my ten-digit phone number. And it was prime! I have a prime cell phone number!

Of course, I tried this with other numbers... my SSN isn't prime, and neither is my dad's phone number. My seven-digit phone number can be divided by two square numbers... so it's really not prime...

But I still find the prime phone number interesting.

Question 1:

Do any of you have prime phone numbers? (You don't have to say what the number is)

Question 2:

Does anyone know the probability of a ten-digit phone number being prime?

Of course, I tried this with other numbers... my SSN isn't prime, and neither is my dad's phone number. My seven-digit phone number can be divided by two square numbers... so it's really not prime...

But I still find the prime phone number interesting.

Question 1:

Do any of you have prime phone numbers? (You don't have to say what the number is)

Question 2:

Does anyone know the probability of a ten-digit phone number being prime?