Cunningham chain

noun

A Cunningham chain of the first kind of length n is a sequence of prime numbers (p₁, ..., pₙ) such that for all 1 ≤ i < n, pᵢ₊₁ = 2pᵢ + 1.

The Cunningham chain is a sequence of prime numbers.

意味（1）

A Cunningham chain of the first kind of length n is a sequence of prime numbers (p₁, ..., pₙ) such that for all 1 ≤ i < n, pᵢ₊₁ = 2pᵢ + 1.

意味（2）

A Cunningham chain of the second kind of length n is a sequence of prime numbers (p₁,...,pₙ) such that for all 1 ≤ i < n, pᵢ₊₁ = 2pᵢ − 1.