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prime number challenge
08-07-2016, 12:30 AM
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prime number challenge
I see in the newspaper today that Amazon Prime Air's first aircraft has a tail number that contains a "prime" number, 1997. I wonder how Amazon staff verified that 1997 is prime. Perhaps they called some geek on this forum!

After I retired a few years ago, I needed a part-time job while I was attending university to get my teaching degree so I could become a math teacher. I signed up with Beeline Courier Service, which was a barrel of fun driving around the city picking up and delivering things. Every courier had a 4-digit courier number that was used to identify him/her on the two-way radio. My assigned 4-digit courier number ending in 41 was a prime number. I eventually resigned from the courier job but returned a couple of years later and my new courier number was exactly 700 more than my first courier number, again ending in 41, and it was a prime number also.

My first courier number was the first 4-digit number (first digit can't be 0) ending in 41 that is prime. What was my first courier number and my second courier number?

Prize for the person with the first correct answer: an "attaboy."
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Messages In This Thread
prime number challenge - Don Shepherd - 08-07-2016 12:30 AM
RE: prime number challenge - Don Shepherd - 08-07-2016, 04:44 AM
RE: prime number challenge - Paul Dale - 08-07-2016, 05:53 AM
RE: prime number challenge - Paul Dale - 08-07-2016, 12:22 PM
RE: prime number challenge - Paul Dale - 08-07-2016, 09:57 PM
RE: prime number challenge - TASP - 08-08-2016, 04:15 PM
RE: prime number challenge - Claudio L. - 08-08-2016, 04:56 PM
RE: prime number challenge - TASP - 08-08-2016, 06:29 PM
RE: prime number challenge - EdS2 - 08-14-2016, 05:14 PM



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