PRP Records

Probable Primes Top 10000

(302395 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 ?
6251(15*2^403912+1)/271121589Lelio R Paula05/2014
6252(211^52301-1)/210121560Anonymous04/2024
6253(10^121543-79)/3121543Robert Price01/2018
6254Phi(85408,1105)121540Henri Lifchitz12/2025
6255801^41852-41852^801121523Norman Luhn10/2024
62562^403676+76831121519Enzo Doria05/2016
6257(41^75337-1)/98233421080121492Paul Vanderveen05/2025
6258715^42564-42564^715121491Norman Luhn10/2024
6259(7*10^121487+143)/3121488Robert Price03/2018
626027965^22086+22086^27965121484Hans Havermann02/2021
6261(893*10^121470+7)/9121472Robert Price06/2021
6262(206*10^121462-11)/3121464Robert Price02/2022
626326282^27481-27481^26282121457Frank Doornink03/2024
6264(77*10^121455+67)/9121456Robert Price12/2021
62652^403363-113635121425Enzo Doria08/2014
626625531^27552-27552^25531121424Frank Doornink02/2024
6267(17*10^121418-113)/3121419Robert Price06/2021
62682^403336-1861469121417Enzo Doria03/2016
626927929^22186+22186^27929121382Hans Havermann02/2021
6270p(24442)#/2-64121381Robert Price04/2017
627111^116555-720121380Enzo Doria11/2012
6272(873^41263+1)/874121353Jinyuan Wang12/2024
62732^403100-461267121346Enzo Doria07/2015
62742^403093-112213121344Enzo Doria06/2014
627529404^13385+13385^29404121340Hans Havermann02/2021
627628106^20745+20745^28106121332Hans Havermann02/2021
6277(316^48539+1)/317121330Eric Chen10/2017
6278(23*10^121320-71)/3121321Robert Price07/2020
62792^403004+1866361121317Enzo Doria03/2016
62802^402953+89121301Lelio R Paula10/2013
62812^402944-2788319121299Enzo Doria03/2016
6282(44*10^121297-719)/9121298Robert Price12/2018
6283Phi(171913,7)121289Henri Lifchitz12/2025
6284(27*2^402865+1)/5121276Lelio R Paula04/2014
62852^402828-113183121264Enzo Doria07/2014
6286(17*10^121242+1)/9121243Serge Batalov05/2010
6287(15*2^402757+1)/101121242Lelio R Paula05/2014
6288282^49477-49477^282121231Norman Luhn10/2024
62902^402715+1874223121230Enzo Doria06/2016
6289(35*10^121229-593)/9121230Robert Price07/2018
6291(91^61879+1)/92121222Paul Bourdelais09/2017
6292291^49190-49190^291121199Norman Luhn10/2024
6293(10^121243)/(121243^10)121193Henri Lifchitz05/2025
629428719^16568+16568^28719121174Hans Havermann02/2021
6295Phi(24773,-17#)121170Henri Lifchitz12/2025
62967*10^121144+9121145Robert Price09/2015
629727490^25467+25467^27490121121Hans Havermann02/2021
629834575^3182+3182^34575121106Hans Havermann02/2021
62995*10^121100-37121101Robert Price11/2021
6300F(579521)/516247738177121101Serge Batalov07/2024
630125592^27467-27467^25592121078Frank Doornink02/2024
630229954^10935+10935^29954120979Hans Havermann02/2021
630333585^3992+3992^33585120946Hans Havermann02/2021
630440296^1003+1003^40296120941Hans Havermann02/2021
63052^401725-113251120932Enzo Doria07/2014
6306(15*2^401677-1)/19120917Lelio R Paula05/2014
63072^401652+73711120910Enzo Doria04/2016
6308(2^401632+3)/79120902Lelio R Paula04/2014
630940450^973+973^40450120870Hans Havermann01/2021
6310(8*10^120851-11)/3120852Robert Price07/2023
631110^120841+88417120842Patrick De Geest04/2020
631210^120841-123456789120841Robert Price02/2020
631310^120841-176853120841Patrick De Geest04/2020
63142^401406-2791331120836Enzo Doria03/2016
6315(28^83497+1)/29120832Robert Price07/2013
6316(22*10^120828+161)/3120829Robert Price05/2019
63172^401369+1867367120825Enzo Doria03/2016
6318(5*10^120821+43)/3120822Robert Price12/2021
631926990^27263-27263^26990120808Frank Doornink03/2024
6320(10^120782+29)/3120782Serge Batalov12/2014
63212^401215-1657120778Yves Minet07/2014
63222^401159+53120761Lelio R Paula10/2013
632327782^22179+22179^27782120739Hans Havermann01/2021
6324242^50649-50649^242120738Norman Luhn09/2024
632532974^4585+4585^32974120730Hans Havermann02/2021
63262^401031-113047120723Enzo Doria07/2014
632730598^8813+8813^30598120713Hans Havermann02/2021
6328(71*10^120703-287)/9120704Robert Price09/2019
632925671^27370-27370^25671120687Frank Doornink02/2024
6330(29*2^400909-1)/303120685Lelio R Paula04/2014
633134793^2940+2940^34793120675Hans Havermann02/2021
633226028^27329-27329^26028120670Frank Doornink03/2024
6333(2^400846+538)/2120667Stefano Morozzi09/2020
6334(166*10^120654+11)/3120656Robert Price03/2021
633534066^3481+3481^34066120652Hans Havermann02/2021
63368*10^120637-27120638Robert Price10/2021
6337(2^400709+3546)/2120626Stefano Morozzi09/2020
6338(2^400700+3126)/2120623Stefano Morozzi09/2020
6339(2^400693+2634)/2120621Stefano Morozzi09/2020
63409*10^120617-61120618Robert Price06/2021
6341(29*10^120590-71)/3120591Robert Price07/2021
63422^400571-15120584Lelio R Paula10/2013
6343(10^120574+359)/9120574Serge Batalov12/2014
6344(8*10^120552-17)/9120552Serge Batalov11/2022
634527431^24810+24810^27431120550Hans Havermann02/2021
63462^400424-216413120540Enzo Doria04/2013
634729090^13911+13911^29090120531Hans Havermann02/2021
6348(2^400346+1722)/2120516Stefano Morozzi09/2020
634927899^20868+20868^27899120510Hans Havermann02/2021
635033740^3729+3729^33740120506Hans Havermann02/2021
6351(17*2^400200-1)/587120471Lelio R Paula05/2014
635217228^28437-28437^17228120466Norbert Schneider08/2025
63531069^39770-39770^1069120463Norbert Schneider05/2025
63552^400166+1874899120462Enzo Doria06/2016
6354(2^400165+1602)/2120462Stefano Morozzi09/2020
63562739^35038-35038^2739120447Norbert Schneider05/2025
635737078^1771+1771^37078120438Hans Havermann02/2021
6358(2^400084+1638)/2120437Stefano Morozzi09/2020
6359(3*2^400045-1)/865120424Lelio R Paula04/2014
636012857^29306-29306^12857120423Norbert Schneider07/2025
63612^399999+54173120412Norman Luhn08/2023
6362(2^399974+2790)/2120404Stefano Morozzi02/2021
63632^399966+73759120402Enzo Doria04/2016
6364(2^399961+2306)/2120400Stefano Morozzi02/2021
6365(112*10^120395-1)/3120397Serge Batalov12/2014
63662^399918-95120388Lelio R Paula04/2013
63672^399918+214009120388Enzo Doria10/2023
6368(28*10^120381-67)/3120382Robert Price10/2020
6369(49*10^120380-139)/9120381Robert Price03/2019
6370(2^399874+2194)/2120374Stefano Morozzi09/2020
63712^399792-1849259120350Enzo Doria08/2015
63729*10^120342-7120343Robert Price09/2015
6373(2^399751+786)/2120337Stefano Morozzi09/2020
6374(331*10^120332-7)/9120334Robert Price04/2022
637514609^28890-28890^14609120316Norbert Schneider09/2025
6376(13*10^120306-37)/3120307Robert Price01/2019
6377(23*10^120299+37)/3120300Robert Price02/2022
637825935^27254-27254^25935120297Frank Doornink03/2024
6379(2^399604+3070)/2120293Stefano Morozzi09/2020
6380(2^399549+1062)/2120276Stefano Morozzi09/2020
63812^399526-1861721120270Enzo Doria11/2015
638212199^29430-29430^12199120261Norbert Schneider08/2025
6383(10^(2*60126+1)+36*10^60126-1)/9120253Robert Price10/2015
638432016^5687+5687^32016120217Hans Havermann01/2021
6385(205*10^120212-1)/3120214Robert Price11/2021
638613302^29149-29149^13302120209Norbert Schneider08/2025
63872^399322-2798111120208Enzo Doria04/2016
638830438^8867+8867^30438120163Hans Havermann02/2021
63893^251841-5*2^251841120159Jon Grantham08/2023
639172^64693-71^64693120157Robert Price03/2014
6390(17*10^120156-161)/9120157Robert Price02/2021
6392Phi(81997,-5#)120150Henri Lifchitz12/2025
63932^399111-28489120145Enzo Doria08/2015
63942958^34607-34607^2958120121Norbert Schneider04/2025
6395(2^399014+1318)/2120115Stefano Morozzi02/2021
639630254^9333+9333^30254120110Hans Havermann02/2021
63972^398972+6561120103Henri Lifchitz10/2024
639830882^7745+7745^30882120101Hans Havermann02/2021
639923687^27452-27452^23687120090Norbert Schneider08/2025
64012^398877+105120074Donovan Johnson01/2006
6400(101*10^120072-87)/7120074Hans Havermann02/2015
6402(88^61751+1)/89120072Paul Bourdelais09/2017
6403U(686581)/4280145953120067Serge Batalov07/2024
640416651^28442-28442^16651120067Norbert Schneider07/2025
640512284^29359-29359^12284120059Norbert Schneider06/2025
64063207^34240-34240^3207120049Norbert Schneider04/2025
64072^398710+57120024Lelio R Paula04/2013
6408(2^398698+1138)/2120020Stefano Morozzi09/2020
64092^398691-115057120018Enzo Doria06/2015
641012134^29385-29385^12134120009Norbert Schneider06/2025
64116089^31710-31710^6089120008Norbert Schneider05/2025
6412L(574219)120005Renaud Lifchitz03/2004
64132^398571+60413119982Yves Minet03/2011
641428623^15538+15538^28623119971Hans Havermann02/2021
6415p(24179)#/2-64119949Robert Price04/2017
64162^398448+1872001119945Enzo Doria05/2016
6417(10^119946*19-91)/6093119944Alfred Reich10/2023
6418(19*10^119946-91)/9/677119944Alfred Reich11/2023
6419(191*10^119941-17)/3119943Robert Price11/2021
6420634^42803+42803^634119938Norbert Schneider07/2019
642131083^7220+7220^31083119935Hans Havermann01/2021
6422(68*10^119931-11)/3119933Robert Price01/2020
64238*10^119930-3119931Ray Chandler04/2011
6424(2^398398+774)/2119930Stefano Morozzi09/2020
6425(10^119880+179)/9119880Serge Batalov12/2014
6426(9*2^398145+1)/73119853Lelio R Paula04/2014
6427(10^119836+77)/3119836Robert Price01/2018
642826681^27074-27074^26681119835Frank Doornink03/2024
642928179^17870+17870^28179119821Hans Havermann02/2021
64302^398029+1872527119819Enzo Doria05/2016
643133142^4119+4119^33142119802Hans Havermann01/2021
64322^397897-113541119779Enzo Doria08/2014
643328636^15171+15171^28636119728Hans Havermann02/2021
643487^61730-61730^87119727Norman Luhn09/2024
6435(10556^29929-1)/(10556^173-1)119724Ryan Propper11/2023
6436(2^397696+1042)/2119719Stefano Morozzi09/2020
6438(19*10^119716+101)/3119717Robert Price09/2019
643729563^11208+11208^29563119717Hans Havermann02/2021
6439458^44991-44991^458119715Norman Luhn09/2024
64402^397655-933075119707Paul Bourdelais06/2021
6441(21*2^397661-1)/27593119705Lelio R Paula04/2014
644228243^17308+17308^28243119701Hans Havermann02/2021
644377*10^119688+3119690Robert Price06/2020
6444586*25^85601+3717119668Eric Chen10/2023
6445(2^397504+1698)/2119661Stefano Morozzi09/2020
6446(58^67853-1)/57119653Paul Bourdelais09/2017
64472^397426+73849119638Enzo Doria04/2016
64488*10^119509+29119510Robert Price11/2021
64492^396933-112723119489Enzo Doria06/2014
645011^114738-150119488Enzo Doria10/2012
6451(4*10^119474+149)/9119474Robert Price04/2018
645226964^26964-13^13119472Henri Lifchitz08/2024
64532^396790-21119446Lelio R Paula04/2013
645432061^5300+5300^32061119405Hans Havermann01/2021
6455(2^396633-7)/5119398Lelio R Paula04/2014
645627382^22913+22913^27382119388Hans Havermann03/2021
6457(2^396577+2522)/2119382Stefano Morozzi09/2020
6458(2^396492+2230)/2119356Stefano Morozzi01/2021
6459(47*10^119354+259)/9119355Robert Price03/2022
6461105^59050+104119352Norbert Schneider11/2016
6460126^56824-125119352Norbert Schneider12/2018
64622^396469+111546435119350Paul Bourdelais10/2021
6463139^55690-138119345Norbert Schneider04/2019
6464Phi(66220,p(66220))119337Henri Lifchitz12/2025
6465Phi(132889,-9)119334Henri Lifchitz12/2025
6466790^41179+41179^790119322Norbert Schneider04/2019
64672^396374+73729119321Enzo Doria04/2016
646988*10^119295+3119297Robert Price05/2020
646821*29^81575+129664119297Eric Chen06/2025
64702^396258-459491119286Enzo Doria05/2015
6471(2^396248+3126)/2119283Stefano Morozzi09/2020
64722^396128-396128-1119247Karsten Bonath06/2018
6473(893*10^119228+7)/9119230Robert Price06/2021
6474(31*10^119229+257)/9119230Robert Price12/2021
6475(28*10^119206-67)/3119207Robert Price10/2020
6476(2^395986+5)/76881119199Lelio R Paula04/2014
647711^114458+6119196Paul Bourdelais02/2021
6478(23*2^395942-1)/91119190Lelio R Paula04/2014
6479(2^395902+202)/2119179Stefano Morozzi09/2020
6480(2^395825+582)/2119155Stefano Morozzi09/2020
6481(2^395733+1130)/2119128Stefano Morozzi09/2020
6482(23^119099)%(10^119099)119099Henri Lifchitz05/2025
648329548^10725+10725^29548119091Hans Havermann02/2021
6484(11*2^395548+1)/3119073Lelio R Paula04/2014
6486(30^80599+1)/31119054Robert Price07/2013
6485Phi(80599,-5#)119054Henri Lifchitz12/2025
6487(232*10^119047+17)/3119049Robert Price04/2021
6488(43*10^119024-403)/9119025Robert Price01/2019
6489(4*10^119021+47)/3119022Robert Price01/2022
6490fibonacci(569433)+3119005Jon Grantham08/2023
649126603^26888-26888^26603118978Norbert Schneider07/2021
6492912^40193-40193^912118972Norman Luhn09/2024
6493681^41992-41992^681118970Norman Luhn09/2024
64946*10^118964+43118965Robert Price07/2020
6495(8*10^118960+49)/3118961Robert Price05/2020
649631253^6402+6402^31253118959Hans Havermann02/2021
6497(194*10^118925-17)/3118927Robert Price09/2020
64982^395062-109121118926Enzo Doria04/2014
64992^395055-4627118924Yves Minet05/2019
6500(2^395054+702)/2118923Stefano Morozzi09/2020


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Created by  Henri Lifchitz & Renaud Lifchitz : October, 26 2000, last modification: January, 24 2026 18:58 (Time in France)

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