{{short description|Irish mathematician}} {{jesuit}} {{Use dmy dates|date=November 2021}} {{Use Hiberno-English|date=November 2021}} Father '''James Cullen''', S.J. (19 April 1867 – 7 December 1933) was an Irish mathematician.
He was born at 89 West Street, Drogheda, County Louth, to Michael Cullen, a baker, and Catherine McDonough.<ref>{{Cite web|url=https://civilrecords.irishgenealogy.ie/churchrecords/details-civil/e8640c3917108|title=General Registrar's Office|last=|first=|date=|website=IrishGenealogy.ie|publisher=|access-date=19 April 2017}}</ref> Initially, he was educated privately, then by the Christian Brothers.<ref>[http://www.fermatsearch.org/history/cullenbio.html Fr James Cullen SJ - Biography] Fermat Search.</ref> He studied pure and applied mathematics at Trinity College, Dublin, then at Mungret College, Limerick, before deciding to become a Jesuit. He studied in England in Mansera House, and St. Mary's, and was ordained as a priest on 31 July 1901.<ref name=tablet/>
In 1905, he taught mathematics at Mount St. Mary's College in Derbyshire and published his finding of what is now known as Cullen numbers in number theory.<ref>{{cite journal | last = Keller | first = Wilfrid | doi = 10.2307/2153382 | issue = 212 | journal = Mathematics of Computation | mr = 1308456 | pages = 1733–1741, S39–S46 | title = New Cullen primes | volume = 64 | year = 1995| doi-access = free }} With a biographical sketch of James Cullen by T. G. Holt and a supplement by Keller and Wolfgang Niebuhr.</ref>
He ended up looking after accounts for the English province of the Jesuits, while contributing to mathematics journals.<ref name=tablet>{{cite news|url=http://archive.thetablet.co.uk/article/16th-december-1933/24/obituary|archive-url=https://web.archive.org/web/20160817110637/http://archive.thetablet.co.uk/article/16th-december-1933/24/obituary|archive-date=2016-08-17|url-status=dead|newspaper=The Tablet|date=16 December 1933|title=The Rev., J. Cullen, S.J.|department=Obituaries}}</ref>
==See also== *Cullen number *List of Jesuit scientists *List of Roman Catholic scientist-clerics
==References== <references/>
==External links== * [http://www.fermatsearch.org/history/cullenbio.html Fermat Search]
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{{DEFAULTSORT:Cullen, James}} Category:1867 births Category:1933 deaths Category:20th-century Irish Jesuits Category:20th-century Irish mathematicians Category:Number theorists Category:Alumni of Trinity College Dublin Category:People from Drogheda Category:Jesuit scientists Category:Christian clergy from County Louth Category:Scientists from County Louth
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