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
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See the Latest PRPs
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Rank |
Probable prime |
Digits (> 50000) |
Who ? |
When ? |
5251 | 28119^22268+22268^28119 | 122253 | Hans Havermann | 03/2021 |
5252 | 32167^6312+6312^32167 | 122240 | Hans Havermann | 03/2021 |
5253 | 3^256199-2^256199 | 122238 | Mike Oakes | 06/2005 |
5254 | 27678^26053+26053^27678 | 122223 | Hans Havermann | 03/2021 |
5255 | 2^405992-78557 | 122216 | Jorge Menendez | 03/2018 |
5256 | (8*10^122203+43)/3 | 122204 | Robert Price | 06/2018 |
5257 | (58*10^122170+329)/9 | 122171 | Robert Price | 05/2019 |
5258 | 2^405774+179149 | 122151 | Enzo Doria | 06/2016 |
5259 | 2^405693+20417 | 122126 | Enzo Doria | 07/2023 |
5260 | (218*10^122109+7)/9 | 122111 | Robert Price | 06/2022 |
5261 | 29189^15246+15246^29189 | 122103 | Hans Havermann | 03/2021 |
5263 | 34*10^122082-9 | 122084 | Robert Price | 06/2020 |
5262 | 33442^4473+4473^33442 | 122084 | Hans Havermann | 03/2021 |
5264 | 5*10^122082+41 | 122083 | Robert Price | 03/2019 |
5265 | 31849^6808+6808^31849 | 122078 | Hans Havermann | 03/2021 |
5267 | 2^405514-3311 | 122072 | Yves Minet | 12/2014 |
5268 | 2^405514-115511 | 122072 | Enzo Doria | 07/2015 |
5266 | 23*10^122070-7 | 122072 | Robert Price | 02/2020 |
5269 | 2^405422-113261 | 122045 | Enzo Doria | 07/2014 |
5270 | 2^405173+71237 | 121970 | Enzo Doria | 04/2016 |
5271 | fibonacci(583574)+2 | 121960 | Jon Grantham | 08/2023 |
5272 | (154*10^121953+17)/9 | 121955 | Robert Price | 06/2022 |
5273 | (34*10^121924+191)/9 | 121925 | Robert Price | 08/2021 |
5274 | (2^405016+1)/257 | 121920 | Lelio R Paula | 04/2014 |
5275 | 28557^18590+18590^28557 | 121918 | Hans Havermann | 03/2021 |
5276 | 28641^18002+18002^28641 | 121877 | Hans Havermann | 03/2021 |
5277 | 2^404858+71329 | 121875 | Enzo Doria | 04/2016 |
5278 | 2^404813-114703 | 121861 | Enzo Doria | 04/2015 |
5279 | 2^404764+77791 | 121847 | Enzo Doria | 05/2016 |
5280 | 28830^16841+16841^28830 | 121847 | Hans Havermann | 03/2021 |
5281 | (4*10^121825+89)/3 | 121826 | Robert Price | 08/2021 |
5282 | 317^48694+48694^317 | 121787 | Norbert Schneider | 08/2015 |
5283 | 2^404536-115259 | 121778 | Enzo Doria | 06/2015 |
5284 | 2^404501-631 | 121767 | Yves Minet | 07/2012 |
5285 | 5*10^121764-69 | 121765 | Robert Price | 02/2021 |
5286 | 28236^20485+20485^28236 | 121738 | Hans Havermann | 02/2021 |
5287 | (382*10^121694-31)/9 | 121696 | Robert Price | 06/2022 |
5288 | 63^67620+2 | 121672 | Lelio R Paula | 08/2015 |
5289 | (25*34^79445-28062367)/33 | 121669 | Eric Chen | 08/2023 |
5290 | (13*33^80110-121453)/32 | 121648 | Eric Chen | 12/2023 |
5291 | (16*10^121633+167)/3 | 121634 | Robert Price | 06/2019 |
5292 | 29955^11494+11494^29955 | 121632 | Hans Havermann | 02/2021 |
5293 | (17*10^121621+1)/9 | 121622 | Serge Batalov | 05/2010 |
5294 | 31088^8163+8163^31088 | 121612 | Hans Havermann | 02/2021 |
5295 | (15*2^403912+1)/271 | 121589 | Lelio R Paula | 05/2014 |
5296 | (211^52301-1)/210 | 121560 | Anonymous | 04/2024 |
5297 | (10^121543-79)/3 | 121543 | Robert Price | 01/2018 |
5298 | 2^403676+76831 | 121519 | Enzo Doria | 05/2016 |
5299 | (7*10^121487+143)/3 | 121488 | Robert Price | 03/2018 |
5300 | 27965^22086+22086^27965 | 121484 | Hans Havermann | 02/2021 |
5301 | (893*10^121470+7)/9 | 121472 | Robert Price | 06/2021 |
5302 | (206*10^121462-11)/3 | 121464 | Robert Price | 02/2022 |
5303 | 26282^27481-27481^26282 | 121457 | Frank Doornink | 03/2024 |
5304 | (77*10^121455+67)/9 | 121456 | Robert Price | 12/2021 |
5305 | 2^403363-113635 | 121425 | Enzo Doria | 08/2014 |
5306 | 25531^27552-27552^25531 | 121424 | Frank Doornink | 02/2024 |
5307 | (17*10^121418-113)/3 | 121419 | Robert Price | 06/2021 |
5308 | 2^403336-1861469 | 121417 | Enzo Doria | 03/2016 |
5309 | 27929^22186+22186^27929 | 121382 | Hans Havermann | 02/2021 |
5310 | p(24442)#/2-64 | 121381 | Robert Price | 04/2017 |
5311 | 11^116555-720 | 121380 | Enzo Doria | 11/2012 |
5312 | 2^403100-461267 | 121346 | Enzo Doria | 07/2015 |
5313 | 2^403093-112213 | 121344 | Enzo Doria | 06/2014 |
5314 | 29404^13385+13385^29404 | 121340 | Hans Havermann | 02/2021 |
5315 | 28106^20745+20745^28106 | 121332 | Hans Havermann | 02/2021 |
5316 | (316^48539+1)/317 | 121330 | Eric Chen | 10/2017 |
5317 | (23*10^121320-71)/3 | 121321 | Robert Price | 07/2020 |
5318 | 2^403004+1866361 | 121317 | Enzo Doria | 03/2016 |
5319 | 2^402953+89 | 121301 | Lelio R Paula | 10/2013 |
5320 | 2^402944-2788319 | 121299 | Enzo Doria | 03/2016 |
5321 | (44*10^121297-719)/9 | 121298 | Robert Price | 12/2018 |
5322 | (27*2^402865+1)/5 | 121276 | Lelio R Paula | 04/2014 |
5323 | 2^402828-113183 | 121264 | Enzo Doria | 07/2014 |
5324 | (17*10^121242+1)/9 | 121243 | Serge Batalov | 05/2010 |
5325 | (15*2^402757+1)/101 | 121242 | Lelio R Paula | 05/2014 |
5327 | 2^402715+1874223 | 121230 | Enzo Doria | 06/2016 |
5326 | (35*10^121229-593)/9 | 121230 | Robert Price | 07/2018 |
5328 | (91^61879+1)/92 | 121222 | Paul Bourdelais | 09/2017 |
5329 | 28719^16568+16568^28719 | 121174 | Hans Havermann | 02/2021 |
5330 | 7*10^121144+9 | 121145 | Robert Price | 09/2015 |
5331 | 27490^25467+25467^27490 | 121121 | Hans Havermann | 02/2021 |
5332 | 34575^3182+3182^34575 | 121106 | Hans Havermann | 02/2021 |
5333 | 5*10^121100-37 | 121101 | Robert Price | 11/2021 |
5334 | F(579521)/516247738177 | 121101 | Serge Batalov | 07/2024 |
5335 | 25592^27467-27467^25592 | 121078 | Frank Doornink | 02/2024 |
5336 | 29954^10935+10935^29954 | 120979 | Hans Havermann | 02/2021 |
5337 | 33585^3992+3992^33585 | 120946 | Hans Havermann | 02/2021 |
5338 | 40296^1003+1003^40296 | 120941 | Hans Havermann | 02/2021 |
5339 | 2^401725-113251 | 120932 | Enzo Doria | 07/2014 |
5340 | (15*2^401677-1)/19 | 120917 | Lelio R Paula | 05/2014 |
5341 | 2^401652+73711 | 120910 | Enzo Doria | 04/2016 |
5342 | (2^401632+3)/79 | 120902 | Lelio R Paula | 04/2014 |
5343 | 40450^973+973^40450 | 120870 | Hans Havermann | 01/2021 |
5344 | (8*10^120851-11)/3 | 120852 | Robert Price | 07/2023 |
5345 | 10^120841+88417 | 120842 | Patrick De Geest | 04/2020 |
5346 | 10^120841-123456789 | 120841 | Robert Price | 02/2020 |
5347 | 10^120841-176853 | 120841 | Patrick De Geest | 04/2020 |
5348 | 2^401406-2791331 | 120836 | Enzo Doria | 03/2016 |
5349 | (28^83497+1)/29 | 120832 | Robert Price | 07/2013 |
5350 | (22*10^120828+161)/3 | 120829 | Robert Price | 05/2019 |
5351 | 2^401369+1867367 | 120825 | Enzo Doria | 03/2016 |
5352 | (5*10^120821+43)/3 | 120822 | Robert Price | 12/2021 |
5353 | 26990^27263-27263^26990 | 120808 | Frank Doornink | 03/2024 |
5354 | (10^120782+29)/3 | 120782 | Serge Batalov | 12/2014 |
5355 | 2^401215-1657 | 120778 | Yves Minet | 07/2014 |
5356 | 2^401159+53 | 120761 | Lelio R Paula | 10/2013 |
5357 | 27782^22179+22179^27782 | 120739 | Hans Havermann | 01/2021 |
5358 | 32974^4585+4585^32974 | 120730 | Hans Havermann | 02/2021 |
5359 | 2^401031-113047 | 120723 | Enzo Doria | 07/2014 |
5360 | 30598^8813+8813^30598 | 120713 | Hans Havermann | 02/2021 |
5361 | (71*10^120703-287)/9 | 120704 | Robert Price | 09/2019 |
5362 | 25671^27370-27370^25671 | 120687 | Frank Doornink | 02/2024 |
5363 | (29*2^400909-1)/303 | 120685 | Lelio R Paula | 04/2014 |
5364 | 34793^2940+2940^34793 | 120675 | Hans Havermann | 02/2021 |
5365 | 26028^27329-27329^26028 | 120670 | Frank Doornink | 03/2024 |
5366 | (2^400846+538)/2 | 120667 | Stefano Morozzi | 09/2020 |
5367 | (166*10^120654+11)/3 | 120656 | Robert Price | 03/2021 |
5368 | 34066^3481+3481^34066 | 120652 | Hans Havermann | 02/2021 |
5369 | 8*10^120637-27 | 120638 | Robert Price | 10/2021 |
5370 | (2^400709+3546)/2 | 120626 | Stefano Morozzi | 09/2020 |
5371 | (2^400700+3126)/2 | 120623 | Stefano Morozzi | 09/2020 |
5372 | (2^400693+2634)/2 | 120621 | Stefano Morozzi | 09/2020 |
5373 | 9*10^120617-61 | 120618 | Robert Price | 06/2021 |
5374 | (29*10^120590-71)/3 | 120591 | Robert Price | 07/2021 |
5375 | 2^400571-15 | 120584 | Lelio R Paula | 10/2013 |
5376 | (10^120574+359)/9 | 120574 | Serge Batalov | 12/2014 |
5377 | (8*10^120552-17)/9 | 120552 | Serge Batalov | 11/2022 |
5378 | 27431^24810+24810^27431 | 120550 | Hans Havermann | 02/2021 |
5379 | 2^400424-216413 | 120540 | Enzo Doria | 04/2013 |
5380 | 29090^13911+13911^29090 | 120531 | Hans Havermann | 02/2021 |
5381 | (2^400346+1722)/2 | 120516 | Stefano Morozzi | 09/2020 |
5382 | 27899^20868+20868^27899 | 120510 | Hans Havermann | 02/2021 |
5383 | 33740^3729+3729^33740 | 120506 | Hans Havermann | 02/2021 |
5384 | (17*2^400200-1)/587 | 120471 | Lelio R Paula | 05/2014 |
5385 | 2^400166+1874899 | 120462 | Enzo Doria | 06/2016 |
5386 | (2^400165+1602)/2 | 120462 | Stefano Morozzi | 09/2020 |
5387 | 37078^1771+1771^37078 | 120438 | Hans Havermann | 02/2021 |
5388 | (2^400084+1638)/2 | 120437 | Stefano Morozzi | 09/2020 |
5389 | (3*2^400045-1)/865 | 120424 | Lelio R Paula | 04/2014 |
5390 | 2^399999+54173 | 120412 | Norman Luhn | 08/2023 |
5391 | (2^399974+2790)/2 | 120404 | Stefano Morozzi | 02/2021 |
5392 | 2^399966+73759 | 120402 | Enzo Doria | 04/2016 |
5393 | (2^399961+2306)/2 | 120400 | Stefano Morozzi | 02/2021 |
5394 | (112*10^120395-1)/3 | 120397 | Serge Batalov | 12/2014 |
5396 | 2^399918-95 | 120388 | Lelio R Paula | 04/2013 |
5395 | 2^399918+214009 | 120388 | Enzo Doria | 10/2023 |
5397 | (28*10^120381-67)/3 | 120382 | Robert Price | 10/2020 |
5398 | (49*10^120380-139)/9 | 120381 | Robert Price | 03/2019 |
5399 | (2^399874+2194)/2 | 120374 | Stefano Morozzi | 09/2020 |
5400 | 2^399792-1849259 | 120350 | Enzo Doria | 08/2015 |
5401 | 9*10^120342-7 | 120343 | Robert Price | 09/2015 |
5402 | (2^399751+786)/2 | 120337 | Stefano Morozzi | 09/2020 |
5403 | (331*10^120332-7)/9 | 120334 | Robert Price | 04/2022 |
5404 | (13*10^120306-37)/3 | 120307 | Robert Price | 01/2019 |
5405 | (23*10^120299+37)/3 | 120300 | Robert Price | 02/2022 |
5406 | 25935^27254-27254^25935 | 120297 | Frank Doornink | 03/2024 |
5407 | (2^399604+3070)/2 | 120293 | Stefano Morozzi | 09/2020 |
5408 | (2^399549+1062)/2 | 120276 | Stefano Morozzi | 09/2020 |
5409 | 2^399526-1861721 | 120270 | Enzo Doria | 11/2015 |
5410 | (10^(2*60126+1)+36*10^60126-1)/9 | 120253 | Robert Price | 10/2015 |
5411 | 32016^5687+5687^32016 | 120217 | Hans Havermann | 01/2021 |
5412 | (205*10^120212-1)/3 | 120214 | Robert Price | 11/2021 |
5413 | 2^399322-2798111 | 120208 | Enzo Doria | 04/2016 |
5414 | 30438^8867+8867^30438 | 120163 | Hans Havermann | 02/2021 |
5415 | 3^251841-5*2^251841 | 120159 | Jon Grantham | 08/2023 |
5417 | 72^64693-71^64693 | 120157 | Robert Price | 03/2014 |
5416 | (17*10^120156-161)/9 | 120157 | Robert Price | 02/2021 |
5418 | 2^399111-28489 | 120145 | Enzo Doria | 08/2015 |
5419 | (2^399014+1318)/2 | 120115 | Stefano Morozzi | 02/2021 |
5420 | 30254^9333+9333^30254 | 120110 | Hans Havermann | 02/2021 |
5421 | 30882^7745+7745^30882 | 120101 | Hans Havermann | 02/2021 |
5423 | 2^398877+105 | 120074 | Donovan Johnson | 01/2006 |
5422 | (101*10^120072-87)/7 | 120074 | Hans Havermann | 02/2015 |
5424 | (88^61751+1)/89 | 120072 | Paul Bourdelais | 09/2017 |
5425 | U(686581)/4280145953 | 120067 | Serge Batalov | 07/2024 |
5426 | 2^398710+57 | 120024 | Lelio R Paula | 04/2013 |
5427 | (2^398698+1138)/2 | 120020 | Stefano Morozzi | 09/2020 |
5428 | 2^398691-115057 | 120018 | Enzo Doria | 06/2015 |
5429 | L(574219) | 120005 | Renaud Lifchitz | 03/2004 |
5430 | 2^398571+60413 | 119982 | Yves Minet | 03/2011 |
5431 | 28623^15538+15538^28623 | 119971 | Hans Havermann | 02/2021 |
5432 | p(24179)#/2-64 | 119949 | Robert Price | 04/2017 |
5433 | 2^398448+1872001 | 119945 | Enzo Doria | 05/2016 |
5434 | (10^119946*19-91)/6093 | 119944 | Alfred Reich | 10/2023 |
5435 | (19*10^119946-91)/9/677 | 119944 | Alfred Reich | 11/2023 |
5436 | (191*10^119941-17)/3 | 119943 | Robert Price | 11/2021 |
5437 | 634^42803+42803^634 | 119938 | Norbert Schneider | 07/2019 |
5438 | 31083^7220+7220^31083 | 119935 | Hans Havermann | 01/2021 |
5439 | (68*10^119931-11)/3 | 119933 | Robert Price | 01/2020 |
5440 | 8*10^119930-3 | 119931 | Ray Chandler | 04/2011 |
5441 | (2^398398+774)/2 | 119930 | Stefano Morozzi | 09/2020 |
5442 | (10^119880+179)/9 | 119880 | Serge Batalov | 12/2014 |
5443 | (9*2^398145+1)/73 | 119853 | Lelio R Paula | 04/2014 |
5444 | (10^119836+77)/3 | 119836 | Robert Price | 01/2018 |
5445 | 26681^27074-27074^26681 | 119835 | Frank Doornink | 03/2024 |
5446 | 28179^17870+17870^28179 | 119821 | Hans Havermann | 02/2021 |
5447 | 2^398029+1872527 | 119819 | Enzo Doria | 05/2016 |
5448 | 33142^4119+4119^33142 | 119802 | Hans Havermann | 01/2021 |
5449 | 2^397897-113541 | 119779 | Enzo Doria | 08/2014 |
5450 | 28636^15171+15171^28636 | 119728 | Hans Havermann | 02/2021 |
5451 | (10556^29929-1)/(10556^173-1) | 119724 | Ryan Propper | 11/2023 |
5452 | (2^397696+1042)/2 | 119719 | Stefano Morozzi | 09/2020 |
5454 | (19*10^119716+101)/3 | 119717 | Robert Price | 09/2019 |
5453 | 29563^11208+11208^29563 | 119717 | Hans Havermann | 02/2021 |
5455 | 2^397655-933075 | 119707 | Paul Bourdelais | 06/2021 |
5456 | (21*2^397661-1)/27593 | 119705 | Lelio R Paula | 04/2014 |
5457 | 28243^17308+17308^28243 | 119701 | Hans Havermann | 02/2021 |
5458 | 77*10^119688+3 | 119690 | Robert Price | 06/2020 |
5459 | 586*25^85601+3717 | 119668 | Eric Chen | 10/2023 |
5460 | (2^397504+1698)/2 | 119661 | Stefano Morozzi | 09/2020 |
5461 | (58^67853-1)/57 | 119653 | Paul Bourdelais | 09/2017 |
5462 | 2^397426+73849 | 119638 | Enzo Doria | 04/2016 |
5463 | 8*10^119509+29 | 119510 | Robert Price | 11/2021 |
5464 | 2^396933-112723 | 119489 | Enzo Doria | 06/2014 |
5465 | 11^114738-150 | 119488 | Enzo Doria | 10/2012 |
5466 | (4*10^119474+149)/9 | 119474 | Robert Price | 04/2018 |
5467 | 26964^26964-13^13 | 119472 | Henri Lifchitz | 08/2024 |
5468 | 2^396790-21 | 119446 | Lelio R Paula | 04/2013 |
5469 | 32061^5300+5300^32061 | 119405 | Hans Havermann | 01/2021 |
5470 | (2^396633-7)/5 | 119398 | Lelio R Paula | 04/2014 |
5471 | 27382^22913+22913^27382 | 119388 | Hans Havermann | 03/2021 |
5472 | (2^396577+2522)/2 | 119382 | Stefano Morozzi | 09/2020 |
5473 | (2^396492+2230)/2 | 119356 | Stefano Morozzi | 01/2021 |
5474 | (47*10^119354+259)/9 | 119355 | Robert Price | 03/2022 |
5476 | 105^59050+104 | 119352 | Norbert Schneider | 11/2016 |
5475 | 126^56824-125 | 119352 | Norbert Schneider | 12/2018 |
5477 | 2^396469+111546435 | 119350 | Paul Bourdelais | 10/2021 |
5478 | 139^55690-138 | 119345 | Norbert Schneider | 04/2019 |
5479 | 790^41179+41179^790 | 119322 | Norbert Schneider | 04/2019 |
5480 | 2^396374+73729 | 119321 | Enzo Doria | 04/2016 |
5481 | 88*10^119295+3 | 119297 | Robert Price | 05/2020 |
5482 | 2^396258-459491 | 119286 | Enzo Doria | 05/2015 |
5483 | (2^396248+3126)/2 | 119283 | Stefano Morozzi | 09/2020 |
5484 | 2^396128-396128-1 | 119247 | Karsten Bonath | 06/2018 |
5485 | (893*10^119228+7)/9 | 119230 | Robert Price | 06/2021 |
5486 | (31*10^119229+257)/9 | 119230 | Robert Price | 12/2021 |
5487 | (28*10^119206-67)/3 | 119207 | Robert Price | 10/2020 |
5488 | (2^395986+5)/76881 | 119199 | Lelio R Paula | 04/2014 |
5489 | 11^114458+6 | 119196 | Paul Bourdelais | 02/2021 |
5490 | (23*2^395942-1)/91 | 119190 | Lelio R Paula | 04/2014 |
5491 | (2^395902+202)/2 | 119179 | Stefano Morozzi | 09/2020 |
5492 | (2^395825+582)/2 | 119155 | Stefano Morozzi | 09/2020 |
5493 | (2^395733+1130)/2 | 119128 | Stefano Morozzi | 09/2020 |
5494 | 29548^10725+10725^29548 | 119091 | Hans Havermann | 02/2021 |
5495 | (11*2^395548+1)/3 | 119073 | Lelio R Paula | 04/2014 |
5496 | (30^80599+1)/31 | 119054 | Robert Price | 07/2013 |
5497 | (232*10^119047+17)/3 | 119049 | Robert Price | 04/2021 |
5498 | (43*10^119024-403)/9 | 119025 | Robert Price | 01/2019 |
5499 | (4*10^119021+47)/3 | 119022 | Robert Price | 01/2022 |
5500 | fibonacci(569433)+3 | 119005 | Jon Grantham | 08/2023 |