PRP Records

Probable Primes Top 10000

(302842 PRPs in the top)


What is a PRP ?

A PRP is a probable prime number, a number that nobody knows how to prove or disprove its primality.
Here are some criterions that can be used to recognize these numbers :

- N does not have any prime factor up to 2^32.
- N cannot be trivially written into a product.
- Take 3 square-free consecutive bases such that (b1/N)=(b2/N)=(b3/N)= -1. N should be such that b1^((N-1)/2)=b2^((N-1)/2)=b3^((N-1)/2)= -1 (mod N).
- Take a prime base such that (b/N)= -1 and b<>b1<>b2<>b3. N should pass the strong test in base b.
- or more (if someone has got an idea) !!!


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1-250   251-500   501-750   751-1000   1001-1250   1251-1500   1501-1750   1751-2000   
2001-2250   2251-2500   2501-2750   2751-3000   3001-3250   3251-3500   3501-3750   3751-4000   
4001-4250   4251-4500   4501-4750   4751-5000   5001-5250   5251-5500   5501-5750   5751-6000   
6001-6250   6251-6500   6501-6750   6751-7000   7001-7250   7251-7500   7501-7750   7751-8000   
8001-8250   8251-8500   8501-8750   8751-9000   9001-9250   9251-9500   9501-9750   9751-10000   


Rank Probable prime Digits (> 50000) Who ? When ?
42512^507551-114025152789Enzo Doria11/2014
4252(6^196337+1)/7152780Paul Bourdelais02/2010
4253(22*10^152670-13)/9152671Robert Price06/2018
425486*17^124075+13152670Eric Chen01/2026
42552^507085+28517152648Enzo Doria01/2024
42562^506917+28847152598Enzo Doria02/2024
42572^506451-22339152457Enzo Doria07/2013
425826463^34460-34460^26463152405Frank Doornink03/2024
425931898^33837-33837^31898152394Frank Doornink01/2024
42602^505995-113185152320Enzo Doria07/2014
4261(8*10^152260-17)/9152260Serge Batalov11/2022
4262(4*10^152253+149)/9152253Robert Price04/2018
426333530^33643-33643^33530152250Norbert Schneider04/2024
4264578^55117-577^55117152230Jean-Louis Charton08/2012
42652^505431-505431152150Henri Lifchitz04/2005
4266(203*10^152143+1)/3152145Robert Price03/2020
426731730^33787-33787^31730152092Frank Doornink01/2024
42682^505089+217787152047Enzo Doria01/2024
426933565^33594-33594^33565152043Norbert Schneider04/2024
42702^505053+73097152037Enzo Doria04/2016
427122*10^151998+3152000Robert Price01/2020
4272(238*10^151979-1)/3151981Robert Price04/2020
4273(2^504793-7)/46765151954Lelio R Paula12/2017
42743^318465+4151947Aurel Gibier09/2024
4275350377#+797581151937Nicolas PALAU08/2017
4276Phi(97785,1105)151925Henri Lifchitz12/2025
4277(79*10^151906-529)/9151907Robert Price01/2022
42782^504618-343991151906Enzo Doria07/2015
42792^504259+211193151798Enzo Doria08/2023
42802^504212-461939151783Enzo Doria07/2015
42817*10^151772-41151773Robert Price08/2021
4282(47^90749-4^90749)/43151740Robert Price12/2025
42832^504054-2231151736Yves Minet10/2011
428425237^34458-34458^25237151686Frank Doornink11/2023
4285(28*10^151682+191)/3151683Robert Price02/2020
42862^503817+23961151665Enzo Doria10/2023
42872^503475-933075151562Paul Bourdelais06/2021
42882^503371+26289151530Enzo Doria12/2023
42892^503361-39883151527Enzo Doria09/2015
42902^503225+382667151486Enzo Doria10/2016
4291(206*10^151483-11)/3151485Robert Price02/2022
4292(844*10^151396-7)/9151398Robert Price05/2021
4293(26*10^151391-503)/9151392Robert Price07/2018
42942^502769+1877567151349Enzo Doria08/2016
42952^502576-4019151291Yves Minet10/2011
42965*10^151257+41151258Robert Price03/2019
42972^502290-2792501151205Enzo Doria02/2016
429817015^35734+35734^17015151185Norbert Schneider12/2025
42992^502181+1868417151172Enzo Doria04/2016
43002^502055+22583151134Enzo Doria09/2023
4301(3*23^110967+41)/22151106Anonymous12/2023
43026*10^151063-77151064Robert Price09/2021
43032^501781-1850503151052Enzo Doria08/2015
4304(2^82589933-1)%(10^151020)151020Anonymous05/2025
4305(5*10^151007+37)/3151008Robert Price03/2018
43063^316494+5*2^316494151007Jon Grantham08/2023
43072^501627-991151005Yves Minet02/2014
43082^501577-115333150990Enzo Doria07/2015
430925239^34298-34298^25239150983Frank Doornink12/2023
4310(19*10^150977-7)/3150978Robert Price12/2023
43118*10^150975+3150976Robert Price08/2015
43122^501512-113669150971Enzo Doria09/2014
431334180^26101+26101^34180150962Norman Luhn04/2024
4314U(1083477)/2166953150949Serge Batalov07/2024
4315(83*10^150908+493)/9150909Robert Price12/2021
431636267^14482+14482^36267150901Norman Luhn04/2024
43172*10^150818+83150819Robert Price12/2021
431848753^1240+1240^48753150814Norman Luhn04/2024
4319(12^139739+1)/13150803Paul Bourdelais09/2011
4320(31^101111-1)/30150792Alexander Zhirkov11/2010
43212^500899-500899150786Henri Lifchitz04/2005
43222^500832+1876801150766Enzo Doria07/2016
4323(23*10^150763-59)/9150764Robert Price05/2018
432446002^1891+1891^46002150735Norman Luhn04/2024
432532001^33458-33458^32001150734Frank Doornink01/2024
43262^500699+1884953150726Enzo Doria02/2017
4327(13*10^150675-37)/3150676Robert Price01/2019
4328(2^500527+lucasV(1,2,500527)+1)/4150674Mike Oakes11/2016
432935365^18204+18204^35365150661Norman Luhn05/2024
43312^500337-71101150617Enzo Doria04/2016
4330(74*10^150616+133)/9150617Robert Price06/2019
4332(2*10^150612-17)/3150612Serge Batalov11/2022
43334*10^150577+91150578Robert Price08/2018
43345649^40132+40132^5649150575Norbert Schneider04/2024
43352^500160+80071150564Enzo Doria06/2016
4336(2^500120+5)/9150551Lelio R Paula12/2017
4338(43*10^150515-421)/9150516Robert Price01/2019
43374695^40994+40994^4695150516Norbert Schneider11/2023
43392^499999+15981150515Norman Luhn08/2023
4340(10^150551-1)/9/385207015049/57498437921/7808738631274081150512Maksym Voznyy08/2014
4341(10^150551-1)/1556587827131683185788921941743157225041150512Robert Price07/2016
434226614^34005-34005^26614150476Frank Doornink03/2024
43432^499861-29503150474Enzo Doria08/2015
4344Phi(64793,-7#)150462Henri Lifchitz12/2025
43452^499653-113533150411Enzo Doria08/2014
4346(14*10^150391-191)/3150392Robert Price10/2020
434729033^33696+33696^29033150382Norbert Schneider10/2023
43482^499534-221150375Yves Minet06/2012
434930110^33567+33567^30110150337Norbert Schneider10/2023
435026212^34023-34023^26212150331Frank Doornink03/2024
4351(28*10^150294+41)/3150295Robert Price07/2021
43522^499225+49727150282Enzo Doria09/2016
4353(695*10^150274+7)/9150276Robert Price12/2021
43542^499054-29261150231Enzo Doria07/2015
435518580^35187+35187^18580150215Norbert Schneider10/2023
4356(844*10^150196-7)/9150198Robert Price05/2021
43572^498907-933075150186Paul Bourdelais06/2021
4358(2^498898-7)/9150183Lelio R Paula10/2015
43593*10^150182+17150183Robert Price07/2018
43605*10^150175+63150176Robert Price09/2020
436129273^33618-33618^29273150154Frank Doornink06/2024
436232363^33292+33292^32363150149Norbert Schneider07/2022
436332^99753-99753^32150144Henri Lifchitz08/2024
4364(77*10^150128+67)/9150129Robert Price12/2021
4365(7*10^(2*75062+1)-9*10^75062-7)/9150125Robert Price12/2023
43662^498623+1866983150101Enzo Doria03/2016
436733194^33194-213^213150073Serge Batalov04/2024
436827868^33759-33759^27868150063Frank Doornink06/2024
4369(25*10^150050-403)/9150051Robert Price12/2020
4370numbpart(18140942830)150033Serge Batalov04/2017
437110^150029+4381150030Patrick De Geest05/2016
437210^150029-41150029Serge Batalov12/2014
437333185^33185+618^618150028Serge Batalov04/2024
43749*34^97952+529150013Eric Chen08/2023
437510^150000+1158603150001Patrick De Geest09/2018
437610^150000-245703150000Patrick De Geest09/2018
4377(38*10^149999+691)/9150000Robert Price10/2018
43782043563126843649194^8192+2043563126843649185^8192150000Youcef Lemsafer01/2023
4379(2043563126843649232^8192+2043563126843649201^8192)/147457149994Youcef Lemsafer01/2023
43802^498238-53149985Lelio R Paula12/2017
438145728^1905+1905^45728149984Hans Havermann10/2020
4382(211^65024+1)/(211^512+1)149945Martin Hopf12/2023
43835*10^149907+23149908Robert Price03/2019
438432^99585-829149891Eric Chen11/2023
438539347^6442+6442^39347149874Hans Havermann09/2020
43862^497850+81049149868Enzo Doria07/2016
4387V(1075416)149830Serge Batalov07/2024
438837228^10575+10575^37228149816Hans Havermann10/2020
4389(5*2^497673+1)/2743149812Lelio R Paula10/2015
4390(5*2^497671+1)/373703149810Lelio R Paula10/2015
4391(2*10^149803-143)/3149803Robert Price03/2018
439233845^26604+26604^33845149763Hans Havermann09/2020
43932^497434-2784191149743Enzo Doria10/2015
4394(865*10^149737-1)/9149739Robert Price04/2020
439510^149695-7000001149695Robert Price06/2021
439638237^8214+8214^38237149681Hans Havermann09/2020
4397Phi(745791,2)/1491583149664Anonymous03/2025
4398(497167*2^497167-1)/70975149664Anonymous04/2025
4399(23*10^149655+19)/3149656Robert Price07/2019
44002^497068-113579149633Enzo Doria08/2014
44012^497037+73727149624Enzo Doria04/2016
440211*10^149618+3149620Robert Price07/2021
440334942^19067+19067^34942149562Hans Havermann09/2020
440433696^27449+27449^33696149561Hans Havermann09/2020
44052^496773+77747149544Enzo Doria05/2016
440629937^33400-33400^29937149506Frank Doornink06/2024
4407(7*10^149483-493)/9149483Robert Price04/2021
4408(206*10^149459+7)/3149461Robert Price07/2020
440934589^20940+20940^34589149459Hans Havermann09/2020
44102^496477-113485149455Enzo Doria08/2014
4411(496423*2^496423-1)/223573149439Anonymous04/2025
44123*2^496411-5149436Jon Grantham07/2023
4413((10^74703-1)*10000/9+7481)*10^74703+(10^74703-1)/9149410Hans Havermann09/2019
44142^496270-49451149393Enzo Doria10/2015
44152^496238-1865081149383Enzo Doria01/2016
441633831^26030+26030^33831149380Hans Havermann09/2020
441734131^23780+23780^34131149365Hans Havermann09/2020
4418(5*10^149335-53)/3149336Robert Price09/2020
441926043^33818-33818^26043149330Frank Doornink03/2024
44202^495968-1853699149302Enzo Doria09/2015
44212^495935-4117149292Yves Minet02/2018
44225*2^495930+3149291Jon Grantham07/2023
442335816^14709+14709^35816149267Hans Havermann09/2020
4424(10^149264+7)/191/2683/80557149254Alfred Reich07/2021
442510^149240-40000001149240Robert Price07/2022
442610^149240-10809149240Alfred Reich08/2024
44272^495712-396765149225Enzo Doria07/2013
4428(21*2^495676-1)/4835149211Lelio R Paula10/2015
44292^495420+1880701149137Enzo Doria10/2016
443025646^33823-33823^25646149127Frank Doornink02/2024
44312^495337-1847293149112Enzo Doria07/2015
4432(2^495193-7)/5149068Lelio R Paula10/2015
44332^495163+111546435149059Paul Bourdelais10/2021
443433282^30097+30097^33282149055Hans Havermann09/2020
443537384^9705+9705^37384149050Hans Havermann09/2020
443634808^19143+19143^34808149049Hans Havermann09/2020
4437413^56963-412^56963149013Jean-Louis Charton08/2012
443830657^33212-33212^30657149007Frank Doornink06/2024
443947^89113-46^89113149006Robert Price10/2012
4440V(891190)148997Serge Batalov07/2024
44412^494916+87855148985Lelio R Paula01/2016
44426*10^148982+73148983Robert Price04/2019
44433^312155-4148936Anonymous02/2023
444410^148934+1530019148935Patrick De Geest02/2021
444510^148934-1000000001148934Robert Price11/2020
444610^148934-512057148934Patrick De Geest02/2021
444739000^6571+6571^39000148888Hans Havermann10/2020
44482^494586-2791991148886Enzo Doria02/2016
4449Phi(117375,3^5)148862Henri Lifchitz12/2025
44508*10^148860-3148861Ray Chandler04/2011
445138262^7769+7769^38262148854Hans Havermann10/2020
445210^148816-500001148816Robert Price03/2022
4453(53*10^148811-287)/9148812Robert Price02/2022
44542^494333-286183148810Enzo Doria06/2015
44552^494144-264119148753Enzo Doria05/2014
44566*10^148734+47148735Robert Price06/2022
445728724^33353-33353^28724148696Frank Doornink06/2024
445836502^11823+11823^36502148663Hans Havermann11/2020
4459(5*2^493838-1)/3721148658Lelio R Paula10/2015
446064239^206+206^64239148641Hans Havermann10/2020
4461(23*2^493761-1)/555148636Lelio R Paula10/2015
4462(23*10^148627-137)/3148628Robert Price08/2021
4463(151*10^148601-1)/3148603Robert Price03/2020
44642^493636+82081148600Enzo Doria09/2016
4465((((((((((((((34251^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2148593Serge Batalov07/2016
446627134^33509-33509^27134148563Frank Doornink01/2024
4467177487#+(519643#)/(177487#)148558Makoto Morimoto11/2017
4468(2*10^148460-23)/3148460Robert Price04/2018
4469(28*10^148445+101)/3148446Robert Price09/2020
44702^493065+225148428Henri Lifchitz11/2024
447136203^12556+12556^36203148391Hans Havermann10/2020
447233912^23749+23749^33912148387Hans Havermann10/2020
4473(8*10^148328+1)/9148328Serge Batalov05/2010
447434294^21117+21117^34294148309Hans Havermann10/2020
4475(71*10^148306-539)/9148307Robert Price07/2019
447630814^33039-33039^30814148304Frank Doornink06/2024
447738042^7875+7875^38042148222Hans Havermann10/2020
44785^211959-12874148153Enzo Doria05/2014
447934142^21831+21831^34142148145Hans Havermann10/2020
4480(288*21^112023-13)/5148121Eric Chen03/2026
448110^148112+34059148113Patrick De Geest05/2021
448210^148112-70000001148112Robert Price03/2021
448310^148112-106593148112Patrick De Geest05/2021
448436303^12016+12016^36303148108Hans Havermann10/2020
4485(77*10^148089-149)/9148090Robert Price03/2022
4486(16*10^148071+41)/3148072Robert Price03/2019
4487187^65175-2148068Lelio R Paula11/2017
44882^491851+1871453148062Enzo Doria05/2016
4489(68*10^148060-257)/9148061Robert Price07/2019
4490Phi(162903,-5#)148043Henri Lifchitz12/2025
4491(151*10^148020-1)/3148022Robert Price03/2020
449239153^6032+6032^39153148017Hans Havermann10/2020
449336798^10507+10507^36798147983Hans Havermann12/2020
4494(26*10^147973-23)/3147974Robert Price12/2019
4495Phi(65997,11#)147973Henri Lifchitz12/2025
44962^491521-1865323147963Enzo Doria02/2016
4497(2^491476+7)/71147948Lelio R Paula10/2015
44982*10^147928+47147929Robert Price12/2021
44992^491391-7807147924Lelio R Paula01/2013
45002^491384+236221147922Enzo Doria05/2025


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Created by  Henri Lifchitz & Renaud Lifchitz : October, 26 2000, last modification: March, 24 2026 08:33 (Time in France)

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