411 REFERENCE · Wiktionary
Cunningham chain
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named after mathematician A. J. C. Cunningham.
Noun
en math A certain kind of sequence of prime numbers, with applications in cryptography.
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.
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.
en eponyms