Publications Meetings The Profession Membership Programs Math Samplings Policy & Advocacy In the News About the AMS
Mobile Device Pairing
Green Open Access
Mathematics of Computation
Mathematics of Computation
ISSN 1088-6842(online) ISSN 0025-5718(print)


Some periodic continued fractions with long periods

Authors: C. D. Patterson and H. C. Williams
Journal: Math. Comp. 44 (1985), 523-532
MSC: Primary 11Y65; Secondary 11A55, 11J70
MathSciNet review: 777283
Full-text PDF Free Access

Abstract | References | Similar Articles | Additional Information

Abstract: Let $ p(D)$ be the period length of the continued fraction for $ \sqrt D $ . Under the extended Riemann Hypothesis for $ \mathcal{Q}(\sqrt D )$ one would expect that $ p(D) = O({D^{1/2}}\log \log D)$. In order to test this it is necessary to find values of D for which $ p(D)$ is large. This, in turn, requires that we be able to find solutions to large sets of simultaneous linear congruences. The University of Manitoba Sieve Unit (UMSU), a machine similar to D. H. Lehmer's DLS-127, was used to find such values of D. For example, if $ D = 46257585588439$, then $ p(D) = 25679652$ 25679652. Some results are also obtained for the Voronoi continued fraction for $ ^3\sqrt D $.

References [Enhancements On Off] (What's this?)

Similar Articles

Retrieve articles in Mathematics of Computation with MSC: 11Y65, 11A55, 11J70

Retrieve articles in all journals with MSC: 11Y65, 11A55, 11J70

Additional Information

PII: S 0025-5718(1985)0777283-1
Article copyright: © Copyright 1985 American Mathematical Society