Assume 10 is a primitive root of p, a prime number , p!=7. I need to prove that infinite number of this series : 31 331 3331 ... is divided by p.
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p! = 7? How is that possible?
I wrote it in programming form. I mean p is prime which not equal to 7.
do you have to prove that everything in the series is divided by "same" p?
the question is from old exam in Hebow and I understand it as "the same p"
Hi, Here's a solution.
I was reviewing some of my posts, and realized what I said above is perfect nonsense. The method was correct, but it was all messed up. Here's a corrected version:
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