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| {{for|the rugby league player|Paul Leyland (rugby league)}}
| | Hello and welcome. My name is Figures Wunder. One of the things he loves most is ice skating but he is struggling to discover time for it. Hiring has been my profession for some time but I've currently applied for an additional one. Minnesota is where he's been living for many years.<br><br>My weblog; [http://glskating.com/groups/stay-yeast-infection-free-with-these-helpful-suggestions/ std testing at home] |
| '''Paul Leyland''' is a [[United Kingdom|British]] [[number theory|number theorist]] who has studied [[integer factorization]] and [[primality test]]ing.
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| He has contributed to the factorization of [[RSA-129]], [[RSA-140]], and [[RSA-155]], as well as potential [[factorial prime]]s as large as 400! + 1. He has also studied [[Cunningham number]]s, [[Cullen number]]s, [[Woodall number]]s, etc., and numbers of the form <math>x^y + y^x</math>, which are now called [[Leyland number]]s.<ref name="CP2005">{{cite |author=[[Richard Crandall]] and [[Carl Pomerance]] |title=Prime Numbers: A Computational Perspective |publisher=Springer |date=2005}}</ref> He was involved with the [[NFSNet]] project to use [[distributed computing]] on the [[Internet]] from 2005 to 2008.<ref>{{cite web |title=About NFSNET |deadurl= yes |url= http://www.nfsnet.org/aboutus.html |archiveurl= http://web.archive.org/web/20080509131653/http://www.nfsnet.org/aboutus.html |archivedate= 9 May 2008 |accessdate= 9 August 2011 }}</ref>
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| In 2002 he co-authored a paper with [[Samuel S. Wagstaff Jr.]] entitled "MPQS with three large primes" in the ''Proceedings of the [[Algorithmic Number Theory Symposium]] 2002''. Since Wagstaff co-authored a paper with [[Paul Erdős]], this means Leyland has an [[Erdős number]] of 2.
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| ==References==
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| {{Reflist}}
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| ==External links==
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| *[http://www.leyland.vispa.com/numth/factorization/main.htm Paul Leyland's home page]
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| {{Persondata <!-- Metadata: see [[Wikipedia:Persondata]]. -->
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| | NAME = Leyland, Paul
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| | SHORT DESCRIPTION = British mathematician
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| {{DEFAULTSORT:Leyland, Paul}}
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| [[Category:Living people]]
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| [[Category:Year of birth missing (living people)]]
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| [[Category:Number theorists]]
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| [[Category:British mathematicians]]
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| [[Category:20th-century mathematicians]]
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| [[Category:21st-century mathematicians]]
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| {{UK-mathematician-stub}}
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Hello and welcome. My name is Figures Wunder. One of the things he loves most is ice skating but he is struggling to discover time for it. Hiring has been my profession for some time but I've currently applied for an additional one. Minnesota is where he's been living for many years.
My weblog; std testing at home