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 ?
5501	k(198476)	135054	Robert Price	07/2020
5502	32461^14470+14470^32461	135053	Hans Havermann	12/2020
5503	31353^20288+20288^31353	135045	Hans Havermann	12/2020
5504	5*10^135019+77	135020	Robert Price	12/2018
5505	(10^135011+719)/9	135011	Serge Batalov	12/2014
5506	(197*10^134978+7)/3	134980	Robert Price	12/2020
5507	2^448386-2786261	134978	Enzo Doria	03/2016
5508	26480^30517-30517^26480	134975	Frank Doornink	03/2024
5509	(73*10^134939+143)/9	134940	Robert Price	07/2019
5510	33957^9392+9392^33957	134903	Hans Havermann	12/2020
5511	2^448122+20809	134899	Enzo Doria	08/2023
5512	2^448113-113949	134896	Enzo Doria	11/2014
5513	30958^22755+22755^30958	134887	Hans Havermann	12/2020
5514	2^447888-2786639	134828	Enzo Doria	03/2016
5515	2^447870-396765	134823	Enzo Doria	07/2013
5516	10^(2*67404+1)-10^67404-1	134809	Robert Price	07/2023
5517	2^447766-21791	134791	Enzo Doria	07/2013
5518	(19*10^134786-49)/3	134787	Robert Price	05/2019
5519	Phi(202173,10)/10064306514895399941409	134758	Makoto Kamada	05/2019
5520	(23*2^447647+1)/155	134755	Lelio R Paula	07/2015
5521	2^447552-1019	134727	Yves Minet	02/2014
5522	(2*10^134720-41)/3	134720	Robert Price	02/2018
5523	(25*10^134695-97)/9	134696	Robert Price	01/2022
5524	2^447437-113569	134692	Enzo Doria	08/2014
5525	2^447426-65	134689	Lelio R Paula	08/2017
5526	2^447357-2797573	134668	Enzo Doria	04/2016
5527	2^447278+93	134645	Lelio R Paula	08/2017
5528	33193^11370+11370^33193	134623	Hans Havermann	12/2020
5529	30736^23979+23979^30736	134619	Hans Havermann	11/2020
5530	2^447094-113193	134589	Enzo Doria	07/2014
5531	3^282041-9934	134568	Enzo Doria	05/2014
5532	2^447019-109039	134567	Enzo Doria	04/2014
5533	31376^19437+19437^31376	134561	Hans Havermann	12/2020
5534	2^446990-22041	134558	Enzo Doria	07/2013
5535	123^64370+122	134528	Karsten Bonath	04/2018
5536	30100^29461+29461^30100	134525	Hans Havermann	11/2020
5537	31251^20158+20158^31251	134519	Hans Havermann	11/2020
5538	2^446782-39701	134495	Enzo Doria	09/2015
5539	31817^16858+16858^31817	134485	Hans Havermann	12/2020
5540	32448^13937+13937^32448	134471	Hans Havermann	12/2020
5541	5^192321+3^192321-1	134427	Jon Grantham	08/2023
5542	2^446494-16485	134409	Enzo Doria	04/2013
5543	30042^29785+29785^30042	134408	Hans Havermann	12/2020
5544	29504^30069-30069^29504	134405	Norbert Schneider	12/2014
5545	2^446441+65	134393	Lelio R Paula	08/2017
5546	(10^134385+719)/9	134385	Serge Batalov	12/2014
5547	30043^29688+29688^30043	134370	Hans Havermann	12/2020
5548	(2*10^134364+529)/9	134364	Robert Price	01/2018
5549	34657^7512+7512^34657	134323	Hans Havermann	11/2020
5550	(13*2^446187-1)/661	134314	Lelio R Paula	07/2015
5551	5^192103+3^192103+2^192103+1	134275	Matthias Baur	12/2019
5552	42035^1564+1564^42035	134270	Hans Havermann	12/2020
5554	(2^446022-7)/339	134264	Lelio R Paula	07/2015
5553	30621^24248+24248^30621	134264	Hans Havermann	12/2020
5555	30341^26562+26562^30341	134237	Hans Havermann	11/2020
5556	(189^58967-1)/188	134234	Anonymous	06/2024
5557	10^134209+99867	134210	Patrick De Geest	05/2021
5558	10^134209-80000001	134209	Robert Price	04/2021
5559	10^134209-323283	134209	Patrick De Geest	05/2021
5560	29976^29953+29953^29976	134186	Hans Havermann	12/2020
5561	35038^6755+6755^35038	134183	Hans Havermann	12/2020
5562	63^74568+2	134174	Lelio R Paula	06/2017
5563	2^445671-22071	134161	Enzo Doria	07/2013
5564	532^49205+49205^532	134129	Norbert Schneider	02/2019
5565	36453^4780+4780^36453	134127	Hans Havermann	04/2021
5566	(28*10^134122-1)/9	134123	Serge Batalov	10/2014
5567	2^445515-113859	134114	Enzo Doria	10/2014
5569	(22*10^134111-37)/3	134112	Robert Price	04/2019
5568	31083^20636+20636^31083	134112	Hans Havermann	04/2021
5570	3*2^445478+5	134103	Jon Grantham	07/2023
5571	31622^17379+17379^31622	134079	Hans Havermann	04/2021
5572	5*2^445380-3	134074	Jon Grantham	07/2023
5573	(6*32^89076+4241)/31	134073	Eric Chen	11/2023
5574	(277*10^134059-7)/9	134061	Robert Price	02/2022
5575	2^445328-216917	134058	Enzo Doria	05/2014
5576	2^445202+1874899	134020	Enzo Doria	06/2016
5577	5^191739-3^191739-1	134020	Jon Grantham	08/2023
5578	(35*10^134003-89)/9	134004	Robert Price	02/2022
5579	(13*2^445102+1)/17	133989	Lelio R Paula	07/2015
5580	(35*10^133979-593)/9	133980	Robert Price	07/2018
5581	2*10^133955+51	133956	Robert Price	05/2018
5582	(49*10^133952+437)/9	133953	Robert Price	09/2021
5583	2^444964-113639	133948	Enzo Doria	08/2014
5584	31811^16240+16240^31811	133943	Hans Havermann	04/2021
5585	10^133902+167841	133903	Patrick De Geest	05/2021
5587	28118^30097-30097^28118	133902	Norbert Schneider	01/2015
5586	10^133902-100001	133902	Robert Price	07/2020
5588	2^444784-113859	133894	Enzo Doria	10/2014
5589	(132^63127-1)/131	133864	Anonymous	06/2024
5590	32303^13914+13914^32303	133846	Hans Havermann	04/2021
5591	(29^91493-3^91493)/26	133798	Robert Price	06/2025
5592	(2276213*2^444444+1)/3	133797	Alex_soldier	11/2022
5593	(1403559*2^444444+1)/5	133797	Alex_soldier	11/2022
5594	(1209887*2^444444+1)/9	133797	Alex_soldier	11/2022
5595	(608239*2^444444+1)/25	133796	Alex_soldier	11/2022
5596	(1824587*2^444444+1)/27	133796	Alex_soldier	11/2022
5597	(40795*2^444444+1)/7	133795	Alex_soldier	11/2022
5598	30739^22458+22458^30739	133757	Hans Havermann	04/2021
5599	34942^6721+6721^34942	133739	Hans Havermann	04/2021
5600	(3^280229-1)/1120918	133698	Aurel Gibier	03/2025
5601	(2^444046+100280245065)	133672	Paul Bourdelais	05/2022
5602	34792^6935+6935^34792	133638	Hans Havermann	04/2021
5603	(266*10^133603+1)/3	133605	Robert Price	04/2020
5604	32261^13842+13842^32261	133600	Hans Havermann	04/2021
5605	(89*10^133580+1)/9	133581	Serge Batalov	05/2010
5606	(134*10^133573-11)/3	133575	Robert Price	01/2022
5607	26726^30173-30173^26726	133574	Frank Doornink	03/2024
5608	2^443721+39527	133574	Enzo Doria	11/2024
5609	62^74521-61^74521	133571	Robert Price	05/2013
5610	(182*10^133543+1)/3	133545	Robert Price	02/2020
5611	(103*10^133535+11)/3	133537	Robert Price	01/2021
5612	32589^12520+12520^32589	133537	Hans Havermann	03/2021
5613	2^443590-431651	133534	Maxim Gerspach	08/2026
5614	L(638839)/274700771	133502	Serge Batalov	07/2024
5615	34516^7373+7373^34516	133496	Hans Havermann	04/2021
5616	8*10^133487-37	133488	Robert Price	03/2022
5617	30135^26882+26882^30135	133482	Hans Havermann	04/2021
5618	2^443198-1867301	133416	Enzo Doria	03/2016
5619	27^93192+26	133392	Anonymous	09/2024
5620	(19*10^133390+101)/3	133391	Robert Price	09/2019
5621	(71^72043-1)/70	133369	Paul Bourdelais	09/2017
5622	(17508!^2+1)/(1453817*25094393)	133366	Michael Porter	09/2025
5623	36117^4910+4910^36117	133311	Hans Havermann	04/2021
5624	2^442799+1874633	133296	Enzo Doria	06/2016
5625	L(637751)	133283	Henri Lifchitz	09/2008
5626	109^65410-2	133269	Lelio R Paula	10/2017
5627	2^442688-113489	133263	Enzo Doria	08/2014
5628	(7*2^442640-1)/783	133246	Lelio R Paula	07/2015
5629	(9*2^442463+1)/17441	133192	Lelio R Paula	07/2015
5630	2^442437-1849993	133187	Enzo Doria	08/2015
5631	2^442430-2791721	133185	Enzo Doria	03/2016
5632	(13*2^442428-1)/309	133183	Lelio R Paula	07/2015
5633	29959^27870+27870^29959	133172	Hans Havermann	03/2021
5634	(25*2^442379-1)/71	133169	Lelio R Paula	07/2015
5635	2^442368+213691	133167	Enzo Doria	09/2023
5636	34240^7737+7737^34240	133145	Hans Havermann	03/2021
5637	452^50145+50145^452	133142	Norbert Schneider	09/2020
5638	(355^52201-1)/354	133122	Tom Wu	08/2024
5639	(3^278981-1)/14507014	133101	Paul Vanderveen	05/2025
5640	30659^21796+21796^30659	133011	Hans Havermann	04/2021
5641	33276^9935+9935^33276	133010	Hans Havermann	04/2021
5642	30111^26122+26122^30111	133001	Hans Havermann	04/2021
5643	30790^20869+20869^30790	132998	Hans Havermann	04/2021
5645	(2^441799+78557)/5	132995	Lelio R Paula	07/2015
5644	8*10^132994-27	132995	Robert Price	10/2021
5646	(109*10^132992+11)/3	132994	Robert Price	06/2022
5647	2^441781-2787883	132990	Enzo Doria	03/2016
5648	fibonacci(636232)+4	132965	Jon Grantham	08/2023
5649	(3*2^441685+1)/749	132959	Lelio R Paula	07/2015
5650	2^441618+37	132941	Lelio R Paula	08/2017
5651	34857^6514+6514^34857	132940	Hans Havermann	04/2021
5652	34065^7988+7988^34065	132937	Hans Havermann	04/2021
5653	35571^5452+5452^35571	132914	Hans Havermann	04/2021
5654	2^441521-113575	132912	Enzo Doria	08/2014
5655	7*10^132884-99	132885	Robert Price	06/2019
5656	26987^29988-29988^26987	132882	Frank Doornink	03/2024
5657	(103*10^132879+17)/3	132881	Robert Price	08/2020
5658	2^441396-65	132874	Lelio R Paula	08/2017
5659	33350^9633+9633^33350	132859	Hans Havermann	04/2021
5660	2^441330+1871959	132854	Enzo Doria	05/2016
5661	25772^30111-30111^25772	132825	Frank Doornink	02/2024
5662	2^441063+383	132774	Lelio R Paula	06/2012
5663	(10^132753+7)/17/19	132751	Alfred Reich	06/2021
5664	(22*10^132746+53)/3	132747	Robert Price	07/2019
5665	(77*10^132744-149)/9	132745	Robert Price	03/2022
5666	(22*10^132732+119)/3	132733	Robert Price	04/2021
5667	2^440846+1870909	132708	Enzo Doria	05/2016
5668	(948^44579-1)/947	132701	Jinyuan Wang	04/2023
5669	2^440656-113489	132651	Enzo Doria	08/2014
5670	numbpart(14180123587)	132646	Serge Batalov	04/2017
5671	32950^10591+10591^32950	132622	Hans Havermann	04/2021
5672	33302^9597+9597^33302	132614	Hans Havermann	04/2021
5673	(19*10^132550+191)/3	132551	Robert Price	05/2019
5674	(2^440399-1)/(1621082028116197820931518475633880799)	132538	Dario Alpern	01/2015
5675	(38^83891+1)/39	132529	Robert Price	09/2013
5676	2*10^132493-43	132494	Robert Price	04/2018
5677	31352^16809+16809^31352	132480	Hans Havermann	04/2021
5678	(418*10^132441+23)/9	132443	Robert Price	02/2020
5679	2^439931-21	132433	Lelio R Paula	08/2017
5680	47^79201-46^79201	132432	Robert Price	10/2012
5681	2^439897-113653	132423	Enzo Doria	08/2014
5682	35505^5362+5362^35505	132410	Hans Havermann	03/2021
5683	30079^25222+25222^30079	132402	Hans Havermann	04/2021
5684	(5*2^439822+1)/9	132400	Lelio R Paula	06/2015
5685	(695*10^132356+7)/9	132358	Robert Price	12/2021
5686	(112*10^132337-1)/3	132339	Serge Batalov	12/2014
5687	2^439576-113247	132326	Enzo Doria	07/2014
5688	(7^156589-1)/65346468774	132323	Paul Vanderveen	05/2025
5689	30059^25230+25230^30059	132318	Hans Havermann	04/2021
5690	2^439497-29143	132302	Enzo Doria	07/2015
5691	2^439409-114193	132276	Enzo Doria	12/2014
5692	(39^83137+2^83137)/41	132275	Robert Price	12/2024
5693	(44*10^132233-233)/9	132234	Robert Price	01/2019
5694	25507^30000-30000^25507	132200	Frank Doornink	02/2024
5695	9*10^132148-7	132149	Robert Price	09/2015
5696	V(790390)	132144	Serge Batalov	07/2024
5697	(47*10^132125-119)/9	132126	Robert Price	05/2019
5698	2^438900+214051	132123	Enzo Doria	10/2023
5699	2^438845+1870217	132106	Enzo Doria	05/2016
5700	Phi(293229,-5)	132106	Henri Lifchitz	02/2026
5701	2^438789+87855	132089	Lelio R Paula	01/2016
5702	2^438774-2786411	132085	Enzo Doria	03/2016
5703	2^438755-1848205	132079	Enzo Doria	07/2015
5704	30502^21381+21381^30502	132075	Hans Havermann	04/2021
5705	2^438739-112087	132074	Enzo Doria	06/2014
5706	(588859*29^90289-19)/28	132043	Eric Chen	06/2025
5707	(2^438438+100280245065)	131983	Paul Bourdelais	05/2022
5708	35872^4777+4777^35872	131979	Hans Havermann	04/2021
5709	31198^16945+16945^31198	131938	Hans Havermann	03/2021
5710	13907#+(318259#)/(13907#)	131923	Makoto Morimoto	10/2017
5711	L(631181)	131910	Henri Lifchitz	09/2008
5712	(47*10^131886-119)/9	131887	Robert Price	05/2019
5713	5*2^438096-3	131881	Jon Grantham	07/2023
5714	(3*2^438121+1)/4308193883	131879	Lelio R Paula	06/2015
5715	2^438079-1863877	131875	Enzo Doria	03/2016
5716	(16*10^131872-37)/3	131873	Robert Price	05/2021
5717	(2^438067+5)/329	131869	Lelio R Paula	06/2015
5718	2^437908-113855	131824	Enzo Doria	09/2014
5719	2^437884-286349	131817	Enzo Doria	07/2015
5720	15^112072+14	131807	Alfred Reich	10/2023
5721	5^188558+4	131797	Tyler NeSmith	05/2021
5722	(11*10^131784-17)/3	131785	Robert Price	06/2018
5723	(166^59357-1)/165	131777	Anonymous	06/2024
5724	4*10^131719-93	131720	Robert Price	07/2020
5725	31629^14606+14606^31629	131720	Hans Havermann	04/2021
5726	3^276062-112292	131716	Enzo Doria	07/2014
5727	2^437539+2025	131713	Henri Lifchitz	01/2025
5728	11*31^88313+322688	131708	Eric Chen	05/2024
5729	(7*10^131682+89)/3	131683	Robert Price	08/2020
5730	29512^28969+28969^29512	131681	Hans Havermann	03/2021
5731	2^437343+75953	131654	Enzo Doria	04/2016
5732	35^85243-34^85243	131621	Robert Price	05/2012
5733	(28*10^131586+59)/3	131587	Robert Price	05/2021
5734	(59*10^131575+391)/9	131576	Robert Price	03/2021
5735	Phi(51051,-17#)	131513	Henri Lifchitz	12/2025
5736	39984^1945+1945^39984	131505	Hans Havermann	03/2021
5737	25842^29801-29801^25842	131492	Frank Doornink	03/2024
5738	28592^29505-29505^28592	131482	Frank Doornink	05/2024
5739	25647^29818-29818^25647	131469	Frank Doornink	02/2024
5740	(203*10^131457+1)/3	131459	Robert Price	03/2020
5741	7*10^131421-41	131422	Robert Price	08/2021
5742	87309^32+32^87309	131414	Hans Havermann	03/2021
5743	(68^71713+1)/69	131413	Paul Bourdelais	09/2017
5744	2^436521+224885	131406	Enzo Doria	07/2024
5745	(650*10^131391+43)/9	131393	Tyler Busby	01/2023
5746	2^436451+1884713	131385	Enzo Doria	03/2017
5747	2^436365+35	131359	Robert Price	11/2015
5749	2^436300+1866871	131340	Enzo Doria	03/2016
5748	(7*10^131339+179)/3	131340	Robert Price	09/2018
5750	14^114592-3	131338	Paul Bourdelais	12/2020

Find by discoverer :

PRP Records

Probable Primes Top 10000

(303369 PRPs in the top)