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Questions where prime numbers play a key-role, such as: questions on the distribution of prime numbers (twin primes, gaps between primes, Hardy–Littlewood conjectures, etc); questions on prime numbers with special properties (Wieferich prime, Wolstenholme prime, etc.). This tag is often used as a specialized tag in combination with the top-level tag nt.number-theory and (if applicable) analytic-number-theory.

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A prime number determined by its congruence relation?

The term for this is primorial numbering. What you see is that each digit in the "primorial numbering system" corresponds to a residue in each cyclic ring with prime modulus. So in fact if you are l …
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