PRP Records

Probable Primes Top 10000

(301737 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 ?
5501(F(5)^182099-F(4)^182099)/F(3)127282Wayne Halsdorf08/2013
5502(16*10^127259+197)/3127260Robert Price04/2019
5503(26*10^127240+61)/3127241Robert Price10/2019
5504(234483*27^88884-145)/26127230Curtis Bright05/2015
55052^422515-114997127190Enzo Doria06/2015
55065*10^127179-3127180Robert Price07/2015
550731678^10343+10343^31678127176Hans Havermann03/2021
5508(44*10^127169-233)/9127170Robert Price01/2019
550934947^4352+4352^34947127162Hans Havermann03/2021
55106*10^127158+19127159Robert Price11/2021
551130469^14902+14902^30469127155Hans Havermann03/2021
55125*10^127153+77127154Robert Price12/2018
551329941^17620+17620^29941127130Hans Havermann02/2021
551431607^10516+10516^31607127119Hans Havermann03/2021
5515(19*10^127118-97)/3127119Robert Price10/2021
5516(29*10^127111+691)/9127112Robert Price08/2021
5517736^44335+44335^736127104Norbert Schneider07/2019
551833040^7023+7023^33040127090Hans Havermann03/2021
5519(4*10^127081+167)/9127081Robert Price03/2022
552029748^18661+18661^29748127052Hans Havermann03/2021
552127905^28578-28578^27905127049Frank Doornink03/2024
5522-516776642557847117490*Bern(37960)/34256837217082767928421792453127042Thomas Ritschel06/2017
5523(78^67141-1)/77127036Paul Bourdelais09/2017
5524(14*10^127014-137)/3127015Robert Price04/2021
552531436^10965+10965^31436127002Hans Havermann03/2021
552628905^24758+24758^28905127001Hans Havermann03/2021
55272^421860-113285126993Enzo Doria07/2014
5528(10^127030+7)/81234833/9230384921/6092460488946445358851126991Alfred Reich07/2021
5529(2^421827-7)/11126982Lelio R Paula05/2015
553026268^28729-28729^26268126966Frank Doornink03/2024
553111^121910-840126957Enzo Doria12/2012
5532(56*10^126935+187)/9126936Robert Price10/2021
553328915^24538+24538^28915126933Hans Havermann03/2021
5534(29*10^126928-77)/3126929Robert Price02/2020
5535(259*10^126919-1)/3126921Robert Price12/2020
553610^126919+204567126920Patrick De Geest05/2021
5537(2^421617+100280245065)126920Paul Bourdelais05/2022
553810^126919-100001126919Robert Price07/2020
553928340^28503+28503^28340126907Norbert Schneider02/2021
55402^421534-3001935126895Paul Bourdelais07/2023
5541(71^68539+1)/72126882Paul Bourdelais09/2017
5542(5*10^126871-119)/3126872Robert Price03/2018
5543331^50339-10004126846Enzo Doria07/2012
55442^421363-2790757126843Enzo Doria03/2016
5545(106*10^126839-1)/3126841Serge Batalov12/2014
554637938^2203+2203^37938126828Hans Havermann03/2021
5547(13*10^126819+77)/9126820Robert Price07/2022
5548(7*2^421243+1)/39126807Lelio R Paula05/2014
5550(14*10^126784-83)/3126785Robert Price12/2018
55492^421169-3001935126785Paul Bourdelais07/2023
55512^421161-286183126783Enzo Doria06/2015
555226733^28628-28628^26733126738Frank Doornink03/2024
5553(106*10^126726+17)/3126728Robert Price04/2021
555430718^13347+13347^30718126724Hans Havermann03/2021
55552^420939-113935126716Enzo Doria10/2014
555611*23^93048+356126708Eric Chen08/2023
5557177^56363-2126703Lelio R Paula10/2017
55582^420741-113659126656Enzo Doria08/2014
55592^420694-21126642Lelio R Paula05/2017
5560(13*10^126638+437)/9126639Robert Price04/2018
5561(167*10^126637-17)/3126639Robert Price03/2020
55624*10^126625+87126626Robert Price08/2018
5563(31*2^420556+1)/7126601Lelio R Paula05/2014
55647*10^126600-99126601Robert Price06/2019
5565U(655247)/250330563881/206066063082749126596Serge Batalov07/2024
55662^420424-59189126561Enzo Doria10/2015
556728717^25534+25534^28717126560Hans Havermann03/2021
5568(86*10^126542+103)/9126543Robert Price12/2021
5569(19*10^126517-7)/3126518Robert Price12/2023
557028922^23655+23655^28922126503Hans Havermann03/2021
55712^420126+71893126471Enzo Doria04/2016
557225982^28643-28643^25982126450Frank Doornink03/2024
5573(43*10^126441+47)/9126442Robert Price12/2018
55748*10^126408+71126409Robert Price05/2022
55752^419866+1877059126393Enzo Doria07/2016
557629315^20484+20484^29315126390Hans Havermann03/2021
557729433^19676+19676^29433126384Hans Havermann03/2021
5578F(604711)126377Henri Lifchitz02/2005
55792^419757+72707126360Enzo Doria04/2016
55802^419720-21569126349Enzo Doria07/2013
55812^419637+29126324Henri Lifchitz02/2006
558231004^11865+11865^31004126319Hans Havermann03/2021
55832^419612+1876741126316Enzo Doria07/2016
55842^419520+2793271126289Enzo Doria03/2016
5585(2^419447-5)/369126264Lelio R Paula05/2014
55862^419328-1859939126231Enzo Doria03/2016
55872^419282-1851507126217Enzo Doria08/2015
5588(133*10^126212+17)/3126214Robert Price11/2021
55892^419251+1866143126208Enzo Doria03/2016
559011^121185+2126202Robert Price05/2014
559128203^28352+28352^28203126175Norbert Schneider01/2021
5592(23*2^419036-1)/1393126141Lelio R Paula05/2014
55932^418851+23126087Robert Price09/2015
5594(2^418849-9)/2681126083Lelio R Paula05/2014
55952^418829+167126081Lelio R Paula01/2012
559631037^11530+11530^31037126067Hans Havermann03/2021
55974*10^126064-69126065Robert Price01/2022
5598(31*2^418782-1)/75891126063Lelio R Paula05/2014
5599(19*2^418754-1)/15126058Lelio R Paula05/2014
5600(35*10^126048-323)/9126049Robert Price10/2021
560133016^6551+6551^33016126000Hans Havermann03/2021
56022^418548-111546435125996Paul Bourdelais10/2021
560325134^28625-28625^25134125958Frank Doornink12/2023
560434736^4227+4227^34736125954Hans Havermann03/2021
5605(23*35^81566-144013)/34125944Eric Chen05/2025
560626197^28502-28502^26197125930Frank Doornink03/2024
56072^418319-109501125927Enzo Doria04/2014
56082^418316-112373125926Enzo Doria06/2014
560940398^1309+1309^40398125919Hans Havermann03/2021
5610(8*10^125894-29)/3125895Robert Price07/2018
5611(26*10^125886-413)/9125887Robert Price05/2018
561210^(2*62938+1)-7*10^62938-1125877Robert Price07/2023
561355*10^125847+9125849Robert Price03/2022
56144*10^125832+57125833Robert Price05/2022
56152^417968+1869811125821Enzo Doria06/2016
56162^417902+63125802Lelio R Paula09/2015
5617(10^125792-91)/9125792Serge Batalov12/2014
561830438^13573+13573^30438125791Hans Havermann03/2021
561932867^6714+6714^32867125782Hans Havermann03/2021
562031155^10892+10892^31155125777Hans Havermann03/2021
5621(35*10^125754-593)/9125755Robert Price07/2018
562230455^13464+13464^30455125754Hans Havermann03/2021
5623(32*10^125751-77)/9125752Robert Price06/2018
56242^417704+77011125742Enzo Doria05/2016
562529755^16816+16816^29755125737Hans Havermann03/2021
5626(22*10^125734+203)/9125735Robert Price10/2021
562729918^15915+15915^29918125710Hans Havermann03/2021
5628(10^125706+149)/3125706Serge Batalov12/2014
562928531^25368+25368^28531125659Hans Havermann03/2021
56302^417419-115309125656Enzo Doria07/2015
5631(46*10^125642+593)/9125643Robert Price04/2022
56322^417315+213953125625Enzo Doria10/2023
56332^417300+77281125620Enzo Doria05/2016
563430638^12537+12537^30638125561Hans Havermann03/2021
56352^417095-1657125559Yves Minet07/2014
563630162^14525+14525^30162125538Hans Havermann03/2021
5637(56*10^125535+583)/9125536Robert Price08/2021
5638(23*10^125517-179)/3125518Robert Price06/2022
56399*10^125516+29125517Robert Price03/2022
5640404*35^81280+23125505Eric Chen05/2025
5641(88*10^125492-637)/9125493Robert Price11/2020
564228958^21525+21525^28958125474Hans Havermann02/2021
56452^416773-25125462Lelio R Paula09/2015
5643(10^125482+7)/162685667/1639829194459125462Alfred Reich07/2021
564426078^28409-28409^26078125462Frank Doornink03/2024
564633889^5032+5032^33889125449Hans Havermann03/2021
5647(289511#+292834)/(2^3*146417)125444Makoto Morimoto10/2017
5648(2861^36481+1)/(2861^191+1)125438Martin Hopf12/2023
5649(11*2^416691+1)/43125436Lelio R Paula05/2014
5650(289511#+1896)/(2*3^3*79*780193*9911849)125434Makoto Morimoto06/2019
56512^416641-2*416641+1125422Robert Price05/2018
565233392^5697+5697^33392125409Hans Havermann03/2021
5653(21*2^416566-1)/17125399Lelio R Paula05/2014
56542^416530+1870429125389Enzo Doria05/2016
5655(56*10^125385+691)/9125386Robert Price05/2019
565627953^28198+28198^27953125381Norbert Schneider01/2021
565731074^10837+10837^31074125381Hans Havermann03/2021
565833745^5194+5194^33745125380Hans Havermann03/2021
56592^416490+1875109125376Enzo Doria09/2016
566028360^26331+26331^28360125365Hans Havermann03/2021
56612^416416-114929125354Enzo Doria05/2015
566225805^28412-28412^25805125346Frank Doornink03/2024
5663(77*10^125330-293)/9125331Robert Price09/2019
5664(172*10^125292-1)/9125294Serge Batalov12/2014
56652^416134+1865899125269Enzo Doria03/2016
5666153^57337-152125264Norbert Schneider12/2018
5667(599*10^125224+13)/9125226Robert Price02/2022
5668(9*2^415992+1)/13560845125220Lelio R Paula05/2014
566930054^14657+14657^30054125207Hans Havermann03/2021
5670(23^91943-1)/22125201Robert Price01/2012
56712^415884-933075125194Paul Bourdelais06/2021
567243125^27010-106125185Enzo Doria08/2012
5673(38*10^125166+349)/9125167Robert Price10/2018
567410^125166-5001125166Robert Price12/2021
56752^415765-112603125158Enzo Doria06/2014
56768*10^125088-13125089Robert Price08/2019
5677(25*10^125076-13)/3125077Robert Price09/2019
5678(11*10^125054+73)/3125055Robert Price08/2021
5679(101^62383-1)/17542099700125026Paul Vanderveen06/2025
5680(29*10^125021-113)/3125022Robert Price10/2019
56812^415290-113591125015Enzo Doria08/2014
56822^415276-460919125011Enzo Doria06/2015
56832^415259+77243125006Enzo Doria05/2016
5684(67*10^124990+77)/9124991Robert Price10/2021
56852^415144-3683124971Yves Minet10/2011
56862^415092+111546435124956Paul Bourdelais10/2021
568731936^8173+8173^31936124946Hans Havermann03/2021
568827458^28145-28145^27458124927Frank Doornink03/2024
56895^178715-4124917Tyler NeSmith07/2021
569029767^15700+15700^29767124900Hans Havermann03/2021
5691(310^50131-1)/309124892Tom Wu07/2024
56922^414874+79124890Lelio R Paula01/2015
569325292^28361-28361^25292124874Frank Doornink01/2024
5694(2^414765+7)/1389124854Lelio R Paula05/2014
56952^414618+79459124813Enzo Doria06/2016
5696(61*10^124809-1)/3124811Robert Price01/2020
5697(235*29^85334+129)/28124794Eric Chen06/2025
5698(29*10^124765-71)/3124766Robert Price07/2021
56992^414432-1846709124757Enzo Doria07/2015
57002*10^124751-51124752Robert Price04/2018
5701(56*10^124735+367)/9124736Robert Price06/2019
570227362^28111-28111^27362124733Frank Doornink03/2024
5703(13*2^414274-1)/153124708Lelio R Paula05/2014
5704(23*10^124690+37)/3124691Robert Price02/2022
5705p(25046)#-p(25046+1)124675Henri Lifchitz11/2024
570656*10^124656-3124658Robert Price03/2020
5707(7*10^124648+197)/3124649Robert Price07/2018
57092^414032-5124637Henri Lifchitz07/2006
57082^414032+1872331124637Enzo Doria05/2016
571037373^2158+2158^37373124604Hans Havermann03/2021
571129811^15112+15112^29811124590Hans Havermann03/2021
5712(22^92791-3^92791)/19124564Robert Price02/2025
5713F(596093)/36870605281541124563Serge Batalov07/2024
57142^413781-2023124561Riley Fisher09/2023
571514120^30009-30009^14120124533Norbert Schneider02/2015
571629757^15296+15296^29757124521Hans Havermann03/2021
571735056^3561+3561^35056124504Hans Havermann03/2021
571840588^1167+1167^40588124487Hans Havermann02/2021
5719(85*10^124485-49)/9124486Robert Price12/2020
572064^68909-63^68909124463Robert Price07/2013
572135016^3581+3581^35016124448Hans Havermann03/2021
57222^413387+76253124442Enzo Doria04/2016
572328749^21298+21298^28749124436Hans Havermann03/2021
57242^413352+524287124432Paul Underwood09/2018
5725287117#+391613124424Nicolas PALAU01/2017
5726(4*10^124420+83)/3124421Robert Price02/2018
572734578^3965+3965^34578124421Hans Havermann03/2021
5728(68*10^124392-329)/9124393Robert Price03/2021
5729(27*2^413207-1)/108335124385Lelio R Paula05/2014
573010^124383+58407124384Patrick De Geest08/2021
573210^124383-8000001124383Robert Price04/2021
573110^124383-5801124383Patrick De Geest08/2021
573326091^28154-28154^26091124342Frank Doornink03/2024
5734(41*10^124335-383)/9124336Robert Price11/2018
5735(304*10^124329-43)/9124331Robert Price02/2020
573634716^3811+3811^34716124320Hans Havermann03/2021
573726892^28063-28063^26892124309Frank Doornink03/2024
57382^412868-120599124286Paul Bourdelais02/2012
573910^124248+899089124249Patrick De Geest05/2021
574110^124248-1000001124248Robert Price08/2020
574010^124248-501903124248Patrick De Geest05/2021
574245^75145-2124231Lelio R Paula08/2015
574329901^14272+14272^29901124224Hans Havermann03/2021
57442^412645-112213124219Enzo Doria06/2014
574529837^14500+14500^29837124163Hans Havermann03/2021
574628074^26455+26455^28074124158Hans Havermann03/2021
5747954^41669-41669^954124155Norman Luhn10/2024
5748432^47093-47093^432124113Norman Luhn10/2024
57492^412285+213317124111Enzo Doria09/2023
5750(12^115001-1)/2530033124101Paul Vanderveen06/2025


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Created by  Henri Lifchitz & Renaud Lifchitz : October, 26 2000, last modification: July, 13 2025 09:00 (Time in France)

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