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| | [No title] (Site not responding. Last check: 2007-11-07) |
 | | Cunningham Chain of length 16 ----------------------------- Tony Forbes ----------- A Cunningham chain of length k is a finite set of primes {p_1, p_2,..., p_k}, where either p_{i+1} = 2*p_i + 1, i = 1, 2,..., k - 1, or p_{i+1} = 2*p_i - 1, i = 1, 2,..., k - 1. |
 | | The subject is discussed in Section A7 of Guy's book [1] in which it is reported that Gunter Loh [2] discovered two 12-chains of the first type and one 13-chain of the second type. |
 | | The Cunninghan chain is of the second type, and here it is. {3203000719597029781, 6406001439194059561, 12812002878388119121, 25624005756776238241, 51248011513552476481, 102496023027104952961, 204992046054209905921, 409984092108419811841, 819968184216839623681, 1639936368433679247361, 3279872736867358494721, 6559745473734716989441, 13119490947469433978881, 26238981894938867957761, 52477963789877735915521, 104955927579755471831041}. |
| www.loria.fr /~zimmerma/records/cunningham16 (256 words) |
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