https://indianpedia.org/index.php?action=history&feed=atom&title=Allan_J._C._CunninghamAllan J. C. Cunningham - Revision history2026-07-31T17:21:50ZRevision history for this page on the wikiMediaWiki 1.45.4https://indianpedia.org/index.php?title=Allan_J._C._Cunningham&diff=373279&oldid=prevBot at 09:14, 13 March 20222022-03-13T09:14:25Z<p></p>
<p><b>New page</b></p><div>{{Short description|British-Indian mathematician}}<br />
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{{Infobox scientist<br />
| name = Allan J. C. Cunningham<br />
| image = <br />
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| caption = <br />
| birth_name = Allan Joseph Champneys Cunningham<br />
| birth_date = 1842<br />
| birth_place = [[Delhi]], [[Company rule in India|India]]<br />
| death_date = 1928 (aged 86)<br />
| death_place = [[London]], [[United Kingdom]]<br />
| nationality = British<br />
| fields = [[Number theory]]<br />
| workplaces = <br />
| alma_mater = <br />
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| known_for = {{ublist|[[Cunningham chain]]|[[Cunningham number]]|[[the Cunningham project]]}}<br />
| awards = <br />
}}<br />
'''Allan Joseph Champneys Cunningham''' (1842–1928) was a British-Indian [[mathematician]].<ref>A. E. Western, ''J. London Math. Soc.'' 317–318 (1928)</ref><br />
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==Biography==<br />
Born in [[Delhi]], Cunningham was the son of [[Sir Alexander Cunningham]], archaeologist and the founder of the [[Archaeological Survey of India]].<ref name=dnb>{{cite ODNB|author=Cotton, J. S. & James Lunt (reviser)|chapter=Cunningham, Sir Alexander (1814–1893) |title= Oxford Dictionary of National Biography| year=2004| doi=10.1093/ref:odnb/6916}}</ref> He started a military career with the [[British East India Company|East India Company]]'s [[Bengal Engineer Group|Bengal Engineers]] at a young age. From 1871 to 1881, he was instructor in mathematics at the [[Thomason College of Civil Engineering]]. Upon returning to the [[United Kingdom]] in 1881, he continued teaching at military institutes in [[Chatham, Kent|Chatham]], [[Dublin]] and [[Shorncliffe Army Camp|Shorncliffe]]. He left the army in 1891. He spent the rest of his life studying [[number theory]]. He applied his expertise to finding [[Divisor|factors]] of large numbers of the form ''a<sup>n</sup>''&nbsp;±&nbsp;''b<sup>n</sup>'', such as [[Mersenne numbers]] (<math>2^p-1</math>) and [[Fermat numbers]] (<math>2^{2^n}+1</math>) which have ''b'' = 1. His work is continued in the [[Cunningham project]].<br />
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==References==<br />
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==External links==<br />
*Number Theory Web, [http://www.numbertheory.org/obituaries/LMS/cunningham/ Allan Joseph Champneys Cunningham] (based on the obituary by A.E. Western).<br />
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[[Category:1842 births]]<br />
[[Category:1928 deaths]]<br />
[[Category:People from Delhi]]<br />
[[Category:19th-century British mathematicians]]<br />
[[Category:20th-century British mathematicians]]<br />
[[Category:Number theorists]]<br />
[[Category:British East India Company Army officers]]<br />
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