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) !!!

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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 ?
251	2^1077737+1880117	324432	Enzo Doria	10/2016
252	2^1075425+1880117	323736	Enzo Doria	10/2016
253	10^322999+187071	323000	Stefano Morozzi	03/2019
254	2^1072146+1886869	322749	Enzo Doria	04/2017
255	2^1072118-7321953	322740	Enzo Doria	02/2015
256	2^1071026+1886869	322411	Enzo Doria	04/2017
257	2^1070539+1880633	322265	Enzo Doria	10/2016
258	2^1069293-1147195	321890	Enzo Doria	05/2015
259	2^1065968+1880941	320889	Enzo Doria	10/2016
260	2^1065897-1147195	320867	Enzo Doria	05/2015
261	2^1063427+1882103	320124	Enzo Doria	12/2016
262	2^1061095-1061095	319422	Henri Lifchitz	10/2013
263	2^1060950+653119	319378	Enzo Doria	12/2016
264	2^1060363+782753	319202	Enzo Doria	11/2016
265	2^1054736+483061	317508	Enzo Doria	12/2016
266	2^1053965+1879667	317276	Enzo Doria	10/2016
267	2^1052186-458165	316740	Enzo Doria	03/2015
268	2^1046613-114685	315062	Enzo Doria	04/2015
269	2^1045625-459373	314765	Enzo Doria	06/2015
270	(7*10^314564-61)/9	314564	Erik Branger	09/2016
271	(7^371669-1)/6	314096	Paul Bourdelais	02/2010
272	2^1041944+283051	313657	Enzo Doria	12/2016
273	2^1041153-114391	313419	Enzo Doria	02/2015
274	2^1038871+1866983	312732	Enzo Doria	04/2016
275	2^1037647+1881263	312363	Enzo Doria	11/2016
276	2^1037226+1879699	312237	Enzo Doria	10/2016
277	2^1036867+1865843	312129	Enzo Doria	02/2016
278	2^1036020-114539	311874	Enzo Doria	02/2015
279	2^1032240+1883431	310736	Enzo Doria	01/2017
280	2^1030352+1870021	310167	Enzo Doria	06/2016
281	2^1030046+1882843	310075	Enzo Doria	11/2016
282	(11^293831-1)/10	305993	Paul Bourdelais	03/2010
283	2^1015321-1015321	305643	Henri Lifchitz	08/2013
284	2^1014224-2791229	305312	Enzo Doria	01/2016
285	2^1010751-107709	304267	Enzo Doria	03/2014
286	(2^1010623-1)/12602017578957977	304212	Tony Prest / Never Odd Or Even	02/2014
287	2^1009577+1869587	303913	Enzo Doria	06/2016
288	8^336419-7^336419	303817	Jean-Louis Charton	01/2008
289	2^1008301+1869377	303529	Enzo Doria	06/2016
290	(2^1007838+5)/3	303389	Serge Batalov	08/2015
291	2^1005326+383059	302634	Enzo Doria	12/2016
292	2^1004929+1877567	302514	Enzo Doria	08/2016
293	2^1003494+1874899	302082	Enzo Doria	06/2016
294	2^1003046+60529	301947	Enzo Doria	04/2016
295	2^1000647+1881353	301225	Enzo Doria	11/2016
296	2^1000000+821751	301030	Tony Prest / Never Odd Or Even	10/2015
297	2^999646+1874029	300924	Enzo Doria	06/2016
298	10^300476+3	300477	Ed Trice	10/2012
299	10^300476-530913	300476	Patrick De Geest	03/2016
300	2^998053+1879667	300444	Enzo Doria	09/2016
301	314738^9+9^314738	300337	Anatoly F. Selevich	02/2011
302	7^355039-6^355039	300043	Jean-Louis Charton	05/2011
303	numbpart(72526161452)	299999	Serge Batalov	04/2017
304	2^996182-114431	299881	Enzo Doria	02/2015
305	2^995214-2788361	299590	Enzo Doria	12/2015
306	2^994791-114319	299462	Enzo Doria	01/2015
307	2^994490-1863791	299372	Enzo Doria	01/2016
308	2^993322+1885729	299020	Enzo Doria	03/2017
309	2^992711-2788807	298836	Enzo Doria	12/2015
310	2^992525-114199	298780	Enzo Doria	12/2014
311	2^992329+1884707	298721	Enzo Doria	02/2017
312	(2^986191+1)/3	296873	Vincent Diepeveen	06/2008
313	2^985217-114553	296580	Enzo Doria	03/2015
314	(76^157649-1)/75	296507	Paul Bourdelais	07/2019
315	2^984131-1828009	296253	Enzo Doria	01/2015
316	2^983620+60451	296100	Phil Moore	03/2008
317	2^982721-2683	295829	Yves Minet	02/2016
318	2^981298-2788421	295401	Enzo Doria	12/2015
319	2^981163-2790967	295360	Enzo Doria	12/2015
320	2^979594+1865839	294888	Enzo Doria	02/2016
321	2^976760+1885021	294035	Enzo Doria	02/2017
322	2^974441+1878407	293336	Enzo Doria	08/2016
323	2^974180+1876831	293258	Enzo Doria	07/2016
324	2^974170+453319	293255	Enzo Doria	01/2017
325	2^972744-114419	292826	Enzo Doria	03/2015
326	CopelandErdos(292447)	292447	Mark Rodenkirch	12/2015
327	2^970911+1873373	292274	Enzo Doria	07/2016
328	2^970670+383059	292201	Enzo Doria	12/2016
329	2^970141-100363	292042	Enzo Doria	02/2014
330	2^969945+1874717	291983	Enzo Doria	06/2016
331	2^969384+1880701	291814	Enzo Doria	10/2016
332	(3^611333-2^611333)/(99035947*87109884549431)	291659	Mike Oakes	02/2017
333	2^962194+60139	289650	Enzo Doria	02/2016
334	2^959307-1861507	288781	Enzo Doria	11/2015
335	2^957372+283531	288198	Enzo Doria	02/2017
336	2^957192-1864049	288144	Enzo Doria	01/2016
337	2^956446+1875199	287919	Enzo Doria	06/2016
338	(17^233689+1)/18	287542	Paul Bourdelais	09/2013
339	2^955178+1883587	287538	Enzo Doria	12/2016
340	2^954001+1875257	287183	Enzo Doria	07/2016
341	(23891^65536+1)/2	286932	Serge Batalov	03/2018
342	2^952268+1878601	286662	Enzo Doria	09/2016
343	2^950801+81557	286220	Enzo Doria	08/2016
344	(11*2^948635-13)/15	285568	Renaud Lifchitz	11/2011
345	(54^164839+1)/55	285565	Paul Bourdelais	07/2019
346	2^948510+782569	285530	Enzo Doria	10/2016
347	2^948374-114137	285490	Enzo Doria	01/2015
348	2^947739+1872923	285298	Enzo Doria	06/2016
349	2^942533+82067	283731	Enzo Doria	09/2016
350	2^940950+1874989	283255	Enzo Doria	06/2016
351	2^940426-2786141	283097	Enzo Doria	11/2015
352	2^939881-114115	282933	Enzo Doria	12/2014
353	10^282493+632551	282494	Patrick De Geest	02/2017
355	10^282493-9^282493	282493	Jean-Louis Charton	03/2007
354	10^282493-132327	282493	Patrick De Geest	02/2017
356	3^591827-2^591827	282374	Mike Oakes	08/2009
357	Tau(509^18946)	282048	Nik Lygeros / Olivier Rozier	05/2015
358	2^936716-1835519	281980	Enzo Doria	04/2015
359	2^936588+79411	281942	Enzo Doria	06/2016
360	2^936047+1877423	281779	Enzo Doria	08/2016
361	2^935713+1869377	281678	Enzo Doria	05/2016
362	2^933082+1877059	280886	Enzo Doria	08/2016
363	(5*10^280710+1)/3	280711	Serge Batalov	10/2014
364	(42^172663+1)/43	280274	Paul Bourdelais	07/2019
365	(10^279978+11)/3	279978	Serge Batalov	07/2015
366	2^929524-1864829	279815	Enzo Doria	01/2016
367	2^929152+60181	279703	Enzo Doria	02/2016
368	2^928621-2787883	279543	Enzo Doria	11/2015
369	(2^927763+lucasV(-1,2,927763)+1)/2	279285	Mike Oakes	04/2017
370	2^927429+1882277	279184	Enzo Doria	12/2016
371	(71^150697-1)/70	278978	Paul Bourdelais	07/2019
372	(33^183661-1)/32	278891	Paul Bourdelais	12/2018
373	(2^925391+lucasV(-1,2,925391)+1)/2	278571	Mike Oakes	03/2017
374	2^925330-1301	278553	Yves Minet	06/2015
375	(21^210599+1)/22	278457	Paul Bourdelais	08/2013
376	2^923261-69175	277930	Enzo Doria	11/2015
377	757^96487-756^96487	277796	Jean-Louis Charton	12/2012
378	((((((((((((((291487327^2-2)^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)^2-2	277369	Serge Batalov	07/2016
379	(5^396413-1)/4	277081	Paul Bourdelais	06/2010
380	2^920318+2792299	277044	Enzo Doria	02/2016
381	2^918596-2786939	276525	Enzo Doria	11/2015
382	2^916639+60563	275936	Enzo Doria	04/2016
383	2^916385-2786383	275860	Enzo Doria	11/2015
384	2^915928+82081	275722	Enzo Doria	09/2016
385	2^915576-114137	275616	Enzo Doria	01/2015
386	2^914828+1876741	275391	Enzo Doria	07/2016
387	2^914757-2203	275370	Yves Minet	12/2015
388	2^911900+1871245	274510	Enzo Doria	05/2016
389	2^910490+283429	274085	Enzo Doria	01/2017
390	2^909988-1862249	273934	Enzo Doria	12/2015
391	2^909297+1879157	273726	Enzo Doria	08/2016
392	2^909257-1864423	273714	Enzo Doria	01/2016
393	2^908579-1861747	273510	Enzo Doria	12/2015
394	2^907635-2791597	273226	Enzo Doria	01/2016
395	(53^158341+1)/54	273022	Paul Bourdelais	07/2019
396	2^906594-113201	272912	Enzo Doria	08/2014
397	2^904773+1872167	272364	Enzo Doria	06/2016
398	2^904149-1862473	272176	Enzo Doria	12/2015
399	(7*10^271757-61)/9	271757	Erik Branger	03/2012
400	2^902497+1880117	271679	Enzo Doria	09/2016
401	2^901858+77689	271487	Enzo Doria	06/2016
402	2^901372+1875301	271341	Enzo Doria	06/2016
403	2^899121-115033	270663	Enzo Doria	07/2015
404	2^898900+883021	270596	Enzo Doria	12/2016
405	2^898762-251511	270555	Enzo Doria	12/2013
406	2^898589+47	270503	Lelio R Paula	03/2016
407	187322*10^270343-187321	270349	Danilo Nitsche	09/2013
408	48358*10^270343-48357	270348	Danilo Nitsche	09/2013
409	(10^270343-1)/9	270343	Maksym Voznyy	07/2007
410	2^897867-3217	270285	Yves Minet	12/2016
411	2^897849-115273	270280	Enzo Doria	07/2015
412	2^896616-114179	269909	Enzo Doria	12/2014
413	2^894928+583561	269401	Enzo Doria	04/2017
414	2^894673-39343	269324	Enzo Doria	08/2015
415	F(1285607)	268676	Henri Lifchitz	11/2008
416	2^892112+187663	268553	Enzo Doria	08/2016
417	(10^268207+1)/11	268206	Paul Bourdelais	02/2010
418	2^890957-69583	268205	Enzo Doria	12/2015
419	32841!^2+32840!^2+...+2!^2+1!^2	268128	Serge Batalov	07/2017
420	2^890122-351401	267954	Enzo Doria	07/2015
421	(19^209359-1)/18	267718	Paul Bourdelais	08/2010
422	(85^138647+1)/86	267507	Paul Bourdelais	07/2019
423	2^886324+77791	266811	Enzo Doria	06/2016
424	2^884714+1880527	266326	Enzo Doria	10/2016
425	11^255426+255426^11	265999	Serge Batalov	05/2014
426	2^883462-343421	265949	Enzo Doria	07/2015
427	2^883442+1875019	265943	Enzo Doria	06/2016
428	2^883333-291583	265910	Enzo Doria	07/2015
429	2^880411+1882673	265031	Enzo Doria	12/2016
430	2^879530-2788031	264765	Enzo Doria	12/2015
431	2^878118+2793079	264340	Enzo Doria	02/2016
432	(37^168527-1)/36	264283	Paul Bourdelais	08/2019
433	2^875748-461129	263627	Enzo Doria	07/2015
434	2^875181-2789923	263456	Enzo Doria	12/2015
435	2^875101-350083	263432	Enzo Doria	08/2015
436	2^874684+1883587	263307	Enzo Doria	01/2017
437	2^874616+1872211	263286	Enzo Doria	05/2016
438	2^874073+2792957	263123	Enzo Doria	02/2016
439	2^873628+1878751	262989	Enzo Doria	08/2016
440	2^873288-269	262886	Yves Minet	01/2015
441	2^871146-3173	262242	Yves Minet	07/2016
442	2^869601-163	261776	Yves Minet	01/2015
443	2^869326+282859	261694	Enzo Doria	11/2016
444	2^869035-114181	261606	Enzo Doria	12/2014
445	2^865715+80303	260607	Enzo Doria	07/2016
446	2^865048+1882411	260406	Enzo Doria	12/2016
447	2^864899-113871	260361	Enzo Doria	10/2014
448	(7*10^260198-61)/9	260198	Erik Branger	11/2011
449	2^864298-2788421	260180	Enzo Doria	12/2015
450	2^864039-2791357	260102	Enzo Doria	01/2016
451	2^863621-113833	259976	Enzo Doria	10/2014
452	2^862837+75767	259740	Enzo Doria	05/2016
453	2^862637-31	259680	Jorge Menendez	05/2019
454	2^862088+1874941	259515	Enzo Doria	06/2016
455	2^861987-134557	259484	Hans Havermann	10/2018
456	2^861516-1854029	259343	Enzo Doria	09/2015
457	2^860975-1853977	259180	Enzo Doria	09/2015
458	2^860625-1858843	259074	Enzo Doria	10/2015
459	2^860110+77689	258919	Enzo Doria	05/2016
460	2^859600+1880371	258766	Enzo Doria	10/2016
461	2^859433+494711	258716	Makoto Morimoto	10/2013
462	(2^859433+39899)/(73390746301)	258705	Makoto Morimoto	10/2016
463	2^859240+1875271	258658	Enzo Doria	06/2016
464	Tau(971^15738)	258571	Nik Lygeros / Olivier Rozier	05/2015
465	(144^119671+1)/145	258292	Paul Bourdelais	08/2019
466	(11*2^857159-13)/15	258031	Renaud Lifchitz	08/2011
467	2^857016-633113	257988	Enzo Doria	12/2013
468	2^855732-113969	257602	Enzo Doria	10/2014
469	2^853682-3911	256984	Enzo Doria	05/2014
470	11^246668-90	256879	Enzo Doria	12/2012
471	2^851904-113939	256449	Enzo Doria	10/2014
472	2^851725-851725^2	256395	Henri Lifchitz	03/2019
473	11^246167-90	256357	Enzo Doria	12/2012
474	2^850700-569049	256087	Enzo Doria	11/2013
475	21^193601-20^193601	255983	Jean-Louis Charton	02/2015
476	(37^163193+1)/38	255918	Paul Bourdelais	07/2019
477	2^849177-114025	255628	Enzo Doria	12/2014
478	2^848502-3173	255425	Yves Minet	07/2016
479	2^848178-140291	255328	Enzo Doria	01/2014
480	2^847622-2441	255160	Yves Minet	02/2016
481	2^847291+182843	255061	Enzo Doria	11/2016
482	2^847174+1879429	255025	Enzo Doria	09/2016
483	24*29^174239+13361	254809	Curtis Bright	04/2015
484	2^845610-1868591	254554	Enzo Doria	04/2016
485	2^845484+81931	254517	Enzo Doria	08/2016
486	2^845402-114761	254492	Enzo Doria	05/2015
487	2^844334-2792441	254170	Enzo Doria	02/2016
488	11^243796-90	253888	Enzo Doria	12/2012
489	30^171733-29^171733	253671	Jean-Louis Charton	10/2018
490	2^842209+1876037	253531	Enzo Doria	07/2016
491	2^842123-59197	253505	Enzo Doria	10/2015
492	2^840797-3	253106	Paul Bourdelais	06/2019
493	2^840716-2969	253081	Yves Minet	05/2016
494	2^840358-462491	252973	Enzo Doria	08/2015
495	2^840310+1878379	252959	Enzo Doria	08/2016
496	11^242579-60	252620	Enzo Doria	10/2012
497	45^152659+2	252378	Robert Price	09/2015
498	(95^127583+1)/96	252322	Paul Bourdelais	07/2019
499	2^837725+1869377	252181	Enzo Doria	05/2016
500	2^837536-311039	252124	Enzo Doria	06/2015

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PRP Records

Probable Primes Top 10000

(253466 PRPs in the top)