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Journal Article

How was F6 Factored?

H. C. Williams
Mathematics of Computation
Vol. 61, No. 203, Special Issue Dedicated to Derrick Henry Lehmer (Jul., 1993), pp. 463-474
DOI: 10.2307/2152968
Stable URL: http://www.jstor.org/stable/2152968
Page Count: 12

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Topics: Factorization, Integers, Prime numbers
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
How was F6 Factored?
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Abstract

In 1880 at the age of 82 Fortuné Landry factored the 20 digit number F6 = 264 + 1. How did he do it? Landry himself never described how he factored F6; however, he did leave enough clues in his work and letters to provide some indication of the ideas with which he was working. In this paper we present a likely reconstruction of Landry's technique.

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