Dickson's conjecture

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In number theory, a branch of mathematics, Dickson's conjecture is the conjecture stated by Dickson (1904) that for a finite set of linear forms a1 + b1n, a2 + b2n, ..., ak + bkn with bi ≥ 1, there are infinitely many positive integers n for which they are all prime, unless there is a congruence condition preventing this (Ribenboim 1996, 6.I). The case k = 1 is Dirichlet's theorem.

Two other special cases are well-known conjectures: there are infinitely many twin primes (n and 2 + n are primes), and there are infinitely many Sophie Germain primes (n and 1 + 2n are primes).

Dickson's conjecture is further extended by Schinzel's hypothesis H.

Generalized Dickson's conjecture[edit]

Given n polynomials with positive degrees and integer coefficients (n can be any natural number) that each satisfy all three conditions in the Bunyakovsky conjecture, and for any prime p there is an integer x such that the values of all n polynomials at x are not divisible by p, then there are infinitely many positive integers x such that all values of these n polynomials at x are prime. For example, if the conjecture is true then there are infinitely many positive integers x such that , , and are all prime. When all the polynomials have degree 1, this is the original Dickson's conjecture.

This more general conjecture is the same as the Generalized Bunyakovsky conjecture.

See also[edit]


  • Dickson, L. E. (1904), "A new extension of Dirichlet's theorem on prime numbers", Messenger of Mathematics, 33: 155–161
  • Ribenboim, Paulo (1996), The new book of prime number records, Berlin, New York: Springer-Verlag, ISBN 978-0-387-94457-9, MR 1377060