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Search for : (2^a-1)/b


Rank
Probable prime
Digits (> 10000)
Who?
When?
4(2^7313983-1)/3054920802761932201714Oliver Kruse03/2018
6(2^5240707-1)/753928109031577600Tony Prest / Never Odd Or Even07/2016
15(2^4187251-1)/722343423715191260475Tony Prest / Never Odd Or Even05/2016
22(2^3464473-1)/6048745082991771042896Anand Nair10/2014
56(2^2327417-1)/23915387348002001700606Anand Nair08/2014
115(2^1629469-1)/644908484660139264379223490496Gord Palameta11/2017
184(2^1304983-1)/52199321392832Tony Prest / Never Odd Or Even03/2014
222(2^1168183-1)/54763676838381762583351639Matthias Wurtinger01/2011
292(2^1010623-1)/12602017578957977304212Tony Prest / Never Odd Or Even02/2014
777(2^684127-1)/23765203727205933Jens K. Andersen04/2009
1072(2^611999-1)/18464214225958267477777390354183184199Dario Alpern06/2017
2157(2^432457-1)/1672739247834685086279697130159Tony Prest / Never Odd Or Even09/2013
2421(2^406583-1)/813167122388Jens K. Andersen02/2009
6116(2^271549-1)/23874968248781734Jens K. Andersen02/2009
6124(2^271211-1)/61396149515981631Jens K. Andersen02/2009
8108(2^221509-1)/29239188166673Jens K. Andersen02/2009
12566(2^173867-1)/5253663750268952326Donovan Johnson06/2005
15126(2^151013-1)/6115779116956185959329997569076945428Robert Kinser11/2016
17583(2^136883-1)/53658136141198Donovan Johnson05/2005
18912(2^130439-1)/26087939261Donovan Johnson05/2005
24501(2^106391-1)/28610517129093110332010Donovan Johnson05/2005
108261(2^87691-1)/80695704016757040839544323326371D.Broadhurst and W.Edgington11/2009
109259(2^86371-1)/4168151292103588725984Donovan Johnson05/2005
109461(2^86137-1)/2002153173020983325095996923166179125896D.Broadhurst and W.Edgington02/2011
111477(2^82939-1)/88332390301254027803357181907324938D.Broadhurst and W.Edgington11/2009
158581(2^63703-1)/4280841719169Donovan Johnson05/2005
163947(2^58199-1)/23760490171390757705239117497Donovan Johnson05/2005
165376(2^57131-1)/6148139611716598326103504272661428872295985663117152D.Broadhurst and W.Edgington09/2009
207046(2^41521-1)/4160223538202819752861335772445075206508912459D.Broadhurst and W.Edgington09/2010
207495(2^41263-1)/137970714319999161704928612112395Donovan Johnson05/2004

Total : 30 PRP(s)



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Created by  Henri Lifchitz & Renaud Lifchitz : October, 26 2000, last modification: December, 14 2019 11:13 (Time in France)