Henri & Renaud Lifchitz's PRP Top records

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) !!!

Submit your PRPs

See the Top discoverers
See the Latest PRPs
Search by form


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 ?
9001	2^346084+69211	104182	Stefano Morozzi	11/2024
9002	2^346084+112237	104182	Stefano Morozzi	11/2024
9003	2^346079+10371	104181	Stefano Morozzi	11/2024
9004	2^346079+82811	104181	Stefano Morozzi	11/2024
9008	2^346078+7695	104180	Lelio R Paula	12/2016
9005	2^346076+85903	104180	Stefano Morozzi	11/2024
9006	2^346076+111577	104180	Stefano Morozzi	11/2024
9007	2^346076+143047	104180	Stefano Morozzi	11/2024
9009	2^346072+126673	104179	Stefano Morozzi	11/2024
9010	2^346073+37899	104179	Stefano Morozzi	11/2024
9011	2^346075+21519	104179	Stefano Morozzi	11/2024
9012	2^346075+27255	104179	Stefano Morozzi	11/2024
9013	2^346075+115331	104179	Stefano Morozzi	11/2024
9014	2^346069+53615	104178	Stefano Morozzi	11/2024
9015	2^346069+188087	104178	Stefano Morozzi	11/2024
9016	2^346066+29949	104177	Stefano Morozzi	11/2024
9017	2^346066+133909	104177	Stefano Morozzi	11/2024
9018	2^346066+188535	104177	Stefano Morozzi	11/2024
9019	2^346068+159553	104177	Stefano Morozzi	11/2024
9020	2^346064+122683	104176	Stefano Morozzi	11/2024
9021	2^346060+20325	104175	Stefano Morozzi	11/2024
9022	2^346060+110755	104175	Stefano Morozzi	11/2024
9023	2^346058+57933	104174	Stefano Morozzi	11/2024
9029	2^346055-19537	104173	Enzo Doria	05/2013
9030	(3*2^346057+1)/77	104173	Lelio R Paula	12/2013
9024	2^346052+26655	104173	Stefano Morozzi	11/2024
9025	2^346052+31611	104173	Stefano Morozzi	11/2024
9026	2^346053+67667	104173	Stefano Morozzi	11/2024
9027	2^346054+30507	104173	Stefano Morozzi	11/2024
9028	2^346054+194589	104173	Stefano Morozzi	11/2024
9031	2^346049+59067	104172	Stefano Morozzi	11/2024
9032	2^346050+3129	104172	Stefano Morozzi	11/2024
9033	2^346050+167125	104172	Stefano Morozzi	11/2024
9034	2^346051+52563	104172	Stefano Morozzi	11/2024
9035	2^346051+90941	104172	Stefano Morozzi	11/2024
9036	2^346046+172107	104171	Stefano Morozzi	11/2024
9037	2^346048+63415	104171	Stefano Morozzi	11/2024
9038	2^346041+197885	104169	Stefano Morozzi	11/2024
9042	2^346037-20125	104168	Enzo Doria	06/2013
9039	2^346036+80773	104168	Stefano Morozzi	11/2024
9040	2^346037+116429	104168	Stefano Morozzi	11/2024
9041	2^346038+147549	104168	Stefano Morozzi	11/2024
9043	2^346034+2205	104167	Stefano Morozzi	11/2024
9044	2^346031+56429	104166	Stefano Morozzi	11/2024
9045	2^346031+68439	104166	Stefano Morozzi	11/2024
9046	2^346031+114891	104166	Stefano Morozzi	11/2024
9047	2^346031+190563	104166	Stefano Morozzi	11/2024
9048	2^346026+179305	104165	Stefano Morozzi	11/2024
9049	2^346027+159425	104165	Stefano Morozzi	11/2024
9050	2^346028+12517	104165	Stefano Morozzi	11/2024
9051	2^346022+84705	104164	Stefano Morozzi	11/2024
9052	2^346019+73673	104163	Stefano Morozzi	11/2024
9053	2^346019+78999	104163	Stefano Morozzi	11/2024
9054	2^346019+79955	104163	Stefano Morozzi	11/2024
9055	2^346020+72993	104163	Stefano Morozzi	11/2024
9056	2^346020+188673	104163	Stefano Morozzi	11/2024
9057	2^346021+100311	104163	Stefano Morozzi	11/2024
9061	(34*10^104168-7)/9/13/551179	104162	Makoto Morimoto	05/2016
9058	2^346016+84007	104162	Stefano Morozzi	11/2024
9059	2^346017+122397	104162	Stefano Morozzi	11/2024
9060	2^346017+165791	104162	Stefano Morozzi	11/2024
9062	2^346014+27949	104161	Stefano Morozzi	11/2024
9063	2^346014+46743	104161	Stefano Morozzi	11/2024
9064	2^346015+166089	104161	Stefano Morozzi	11/2024
9065	2^346009+107705	104160	Stefano Morozzi	11/2024
9066	2^346012+35043	104160	Stefano Morozzi	11/2024
9067	2^346012+83091	104160	Stefano Morozzi	11/2024
9075	6^133854-17993	104159	Enzo Doria	03/2013
9068	2^346006+77727	104159	Stefano Morozzi	11/2024
9069	2^346008+9007	104159	Stefano Morozzi	11/2024
9070	2^346008+51567	104159	Stefano Morozzi	11/2024
9071	2^346008+107787	104159	Stefano Morozzi	11/2024
9072	2^346008+146191	104159	Stefano Morozzi	11/2024
9073	2^346008+170823	104159	Stefano Morozzi	11/2024
9074	(131^49201-1)/7538466025870	104159	Paul Vanderveen	06/2025
9076	2^346003+191519	104158	Stefano Morozzi	11/2024
9077	2^345990+1874239	104154	Enzo Doria	06/2016
9078	2^345988-20373	104153	Enzo Doria	06/2013
9079	(2^345965+2214)/2	104146	Stefano Morozzi	09/2020
9080	(26*10^104132-503)/9	104133	Robert Price	07/2018
9081	3*5^148968+8	104125	Lelio R Paula	11/2014
9082	(7*10^104113+53)/3	104114	Robert Price	05/2018
9083	p(21253)#/2+8	104113	Robert Price	01/2017
9084	33582^1259+1259^33582	104106	Hans Havermann	09/2020
9085	32958^1441+1441^32958	104104	Hans Havermann	09/2020
9086	29127^3748+3748^29127	104095	Hans Havermann	09/2020
9087	322^41507+41507^322	104094	Norbert Schneider	12/2014
9088	6^133768-17423	104092	Enzo Doria	03/2013
9089	2^345786-19557	104092	Enzo Doria	05/2013
9090	171^46606-2	104072	Lelio R Paula	10/2017
9091	(29*10^104071+91)/3	104072	Robert Price	04/2020
9092	norm(Mod(x,x^3-x-1)^852167-1)	104070	Paul Vanderveen	09/2022
9093	2^345704-149	104068	Lelio R Paula	09/2011
9094	25821^10712+10712^25821	104056	Hans Havermann	09/2020
9095	(2^345662+2038)/2	104055	Stefano Morozzi	09/2020
9096	6^133704-17273	104042	Enzo Doria	02/2013
9097	(3*2^345590-1)/23	104033	Lelio R Paula	03/2014
9098	(19*2^345590+1)/33859	104030	Lelio R Paula	12/2013
9099	2^345547+11	104021	Lelio R Paula	09/2011
9100	(19*10^104014-49)/3	104015	Robert Price	05/2019
9101	(2^345519+1794)/2	104012	Stefano Morozzi	01/2021
9102	2^345504+723	104008	Lelio R Paula	09/2011
9103	2^345498-20037	104006	Enzo Doria	06/2013
9105	18^82854-37	104005	Lelio R Paula	01/2017
9104	(2^345497+2070)/2	104005	Stefano Morozzi	09/2020
9106	2^345486-109065	104002	Enzo Doria	04/2014
9107	2^345487-1851507	104002	Enzo Doria	08/2015
9108	2^345476+777	103999	Lelio R Paula	09/2011
9109	(2^345477+1554)/2	103999	Stefano Morozzi	09/2020
9110	4*10^103981-83	103982	Robert Price	10/2018
9111	(2^345327+3206)/2	103954	Stefano Morozzi	09/2020
9112	(5*2^345321-1)/3	103953	Lelio R Paula	03/2014
9113	(2^345267-9)/539049127	103927	Lelio R Paula	12/2013
9114	(19*10^103907+77)/3	103908	Robert Price	05/2019
9115	(78557*2^345163+1)/78589	103905	Lelio R Paula	07/2014
9116	2^345106-112181	103888	Enzo Doria	06/2014
9117	(2^345105+1326)/2	103887	Stefano Morozzi	02/2021
9118	2^345079+99	103880	Lelio R Paula	09/2011
9119	(2^345034+1198)/2	103866	Stefano Morozzi	09/2020
9120	11^99736-1500	103865	Enzo Doria	12/2012
9121	(569^37699-1)/568	103863	Serge Batalov	06/2022
9122	(2^345010+2082)/2	103859	Stefano Morozzi	09/2020
9123	23263^23784-23784^23263	103857	Norbert Schneider	01/2020
9124	3*10^103844+31	103845	Robert Price	06/2021
9125	444*33^68368+19	103821	Eric Chen	05/2023
9126	23927^21814+21814^23927	103813	Hans Havermann	09/2020
9127	2^344842-20157	103808	Enzo Doria	06/2013
9128	(47*2^344822+1)/1071	103801	Lelio R Paula	05/2015
9129	2^344802-20765	103796	Enzo Doria	06/2013
9130	2^344794-3821	103794	Yves Minet	05/2011
9131	2^344782-109103	103790	Enzo Doria	04/2014
9132	3^217521-112292	103784	Enzo Doria	06/2014
9133	2^344759-3505	103783	Lelio R Paula	11/2016
9134	2^344735-147	103776	Lelio R Paula	09/2011
9135	L(496533)-p(496533)	103770	Robert Price	02/2018
9136	2*10^103749-69	103750	Robert Price	03/2018
9137	(55459*2^344617+1)/3	103745	Lelio R Paula	07/2014
9138	2^344607-108891	103738	Enzo Doria	03/2014
9140	(2^344608+3798)/2	103738	Stefano Morozzi	02/2021
9139	(1097^34123-1)/1096	103738	Serge Batalov	06/2022
9141	2^344560+22411	103723	Enzo Doria	09/2023
9142	(148*10^103718-1)/3	103720	Robert Price	03/2020
9143	2^344541-19561	103718	Enzo Doria	05/2013
9144	(1017*2^344529-1)/569	103714	Lelio R Paula	05/2015
9145	(8896^26263-1)/8895	103714	Serge Batalov	06/2022
9146	(2^344503+1758)/2	103706	Stefano Morozzi	09/2020
9147	(4*10^103703-1)/3	103704	Serge Batalov	08/2009
9148	2^344444-455	103688	Yves Minet	03/2012
9149	(4*10^103678-43)/3	103679	Robert Price	01/2022
9150	(1353^238539617^9)/10^307661	103673	Hans Havermann	06/2017
9151	(2^344367+2738)/2	103665	Stefano Morozzi	01/2021
9153	2^344317-109933	103650	Enzo Doria	04/2014
9152	26055^9508+9508^26055	103650	Hans Havermann	09/2020
9154	2^344309-1852033	103648	Enzo Doria	08/2015
9155	25729^10672+10672^25729	103643	Hans Havermann	09/2020
9156	(2^344289+1166)/2	103642	Stefano Morozzi	09/2020
9157	3*10^103637+61	103638	Robert Price	09/2020
9158	(2^344246+1614)/2	103629	Stefano Morozzi	09/2020
9159	2^344213-21253	103619	Enzo Doria	06/2013
9160	2^344196-465	103614	Lelio R Paula	11/2016
9161	2^344187-20001	103611	Enzo Doria	06/2013
9162	(117191#+(355573#)/(117191#))/(200233679)	103602	Makoto Morimoto	10/2017
9163	(237^43627-1)/236	103601	Serge Batalov	06/2022
9164	20^79621-19^79621	103590	Jean-Louis Charton	03/2011
9165	Phi(155391,10)/1243129	103586	Maksym Voznyy	09/2015
9166	(9^108553-2^108553)/7	103586	Jon Grantham	07/2023
9167	2^344085-20365	103580	Enzo Doria	06/2013
9168	5^148169+54	103566	Lelio R Paula	11/2016
9169	2^344017-108795	103560	Enzo Doria	03/2014
9170	(2^343974+2670)/2	103547	Stefano Morozzi	09/2020
9171	2^343971-5077	103546	Lelio R Paula	09/2011
9172	(7*10^103531+71)/3	103532	Robert Price	05/2018
9173	2^343899+141	103524	Lelio R Paula	08/2011
9174	(2^343933+1)/(3*98294339989393)	103520	Gord Palameta	08/2018
9175	6^133029-67	103517	Lelio R Paula	11/2016
9176	(17*2^343877+1)/13625	103515	Lelio R Paula	12/2013
9177	66*10^103507+7	103509	Robert Price	07/2020
9178	26297^8614+8614^26297	103485	Hans Havermann	09/2020
9179	(2^343764+2658)/2	103483	Stefano Morozzi	09/2020
9180	26499^8036+8036^26499	103480	Hans Havermann	09/2020
9181	(103^51413-1)/4478483706	103477	Paul Vanderveen	06/2025
9182	(136*10^103474-1)/9	103476	Serge Batalov	12/2014
9183	5^148014-24	103458	Lelio R Paula	11/2016
9184	25^74007-24	103458	Anonymous	09/2024
9185	28316^4503+4503^28316	103453	Hans Havermann	09/2020
9186	(22*10^103450+53)/3	103451	Robert Price	07/2019
9187	2^343604+9931	103436	Yves Minet	01/2011
9188	2^343601-21189	103435	Enzo Doria	06/2013
9189	(10^103423+173)/3	103423	Robert Price	05/2021
9190	2^343508-115229	103407	Enzo Doria	06/2015
9191	(8766^26227-1)/8765	103404	Serge Batalov	06/2022
9192	(509203*2^343491-1)/16147	103403	Lelio R Paula	05/2015
9193	3^216685-113056	103386	Enzo Doria	07/2014
9194	24829^14580+14580^24829	103382	Hans Havermann	08/2020
9195	91355!4+1024	103381	Robert Price	09/2019
9196	44^62903-43^62903	103379	Jean-Louis Charton	08/2012
9197	11^99262-20	103371	Lelio R Paula	12/2016
9198	(509203*2^343357-1)/5	103366	Lelio R Paula	05/2015
9199	(2^343363+3570)/2	103363	Stefano Morozzi	09/2020
9200	2^343356-2791889	103361	Enzo Doria	03/2016
9201	(25*10^103360-241)/9	103361	Robert Price	05/2018
9202	Phi(104989,10)/2939693	103350	Maksym Voznyy	09/2015
9203	(371*33^68040-19)/32	103321	Eric Chen	05/2023
9204	24826^14511+14511^24826	103319	Hans Havermann	09/2020
9205	2^343182-171	103309	Lelio R Paula	08/2011
9206	(23619^23619+23620^23620)/7187	103294	David Broadhurst	09/2009
9207	(16487^24649-1)/(16487^157-1)	103287	Ryan Propper	11/2023
9208	(10680^25639-1)/10679	103285	Serge Batalov	06/2022
9209	(7427^26683-1)/7426	103282	Serge Batalov	06/2022
9210	2^343079-1835611	103278	Enzo Doria	05/2015
9211	2^343063-1147	103273	Yves Minet	06/2013
9212	24741^14930+14930^24741	103271	Hans Havermann	09/2020
9213	(16*10^103255-73)/3	103256	Robert Price	07/2020
9214	(219^44119-1)/218	103256	Serge Batalov	06/2022
9215	9*6^132689+7	103254	Lelio R Paula	11/2014
9216	2^342979-18085	103247	Enzo Doria	05/2013
9217	(16*10^103244-31)/3	103245	Robert Price	03/2019
9218	2^342966-16995	103244	Lelio R Paula	11/2016
9219	23797^21774+21774^23797	103230	Hans Havermann	09/2020
9220	25388^11637+11637^25388	103224	Hans Havermann	09/2020
9221	(2^342876+2086)/2	103216	Stefano Morozzi	09/2020
9222	(16*10^103214-31)/3	103215	Robert Price	03/2019
9224	(37*10^103211+611)/9	103212	Robert Price	11/2018
9223	(238*10^103210-1)/3	103212	Robert Price	04/2020
9225	5^147650+16	103203	Lelio R Paula	11/2016
9226	gcd(Phi(852060,10),(10^42603+1)^3(10^42603+1-10^21302)+(10^85206+10^42603)(10^21302+1)+10^127809)	103201	Serge Batalov	04/2015
9227	Phi(852060L,10)	103201	Anonymous	03/2025
9228	2^342817+2707067	103199	Enzo Doria	03/2016
9229	43^63177-42	103198	Theodore Burton	02/2007
9230	2^342805-21025	103195	Enzo Doria	06/2013
9231	24129^18890+18890^24129	103182	Hans Havermann	09/2020
9232	(622*10^103171-1)/9	103173	Robert Price	11/2021
9233	2^342714+12285	103168	Lelio R Paula	11/2016
9234	(2*10^103161-17)/3	103161	Serge Batalov	11/2022
9235	18^82178-4481	103156	Enzo Doria	03/2013
9236	2^342665-17349	103153	Enzo Doria	05/2013
9237	30408^2467+2467^30408	103150	Hans Havermann	09/2020
9238	(5^147571-3^147571)/2	103148	Kellen Shenton	05/2022
9239	(2^342615+3090)/2	103138	Stefano Morozzi	09/2020
9240	2^342612+175	103137	Lelio R Paula	08/2011
9241	5*2^342585-3	103130	Lelio R Paula	09/2014
9242	(16*10^103127+77)/3	103128	Robert Price	03/2019
9243	(2^342527+3774)/2	103111	Stefano Morozzi	02/2021
9244	2^342503-19209	103104	Enzo Doria	05/2013
9245	(2^342484+2586)/2	103098	Stefano Morozzi	09/2020
9246	2^342476+51	103096	Lelio R Paula	08/2011
9247	2^342460-18885	103091	Enzo Doria	05/2013
9248	(2^342442+862)/2	103086	Stefano Morozzi	02/2021
9249	(194*10^103074-17)/3	103076	Robert Price	09/2020
9250	7^121968+82	103075	Lelio R Paula	10/2016

Find by discoverer :

PRP Records

Probable Primes Top 10000

(302587 PRPs in the top)