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 ? |
3251 | 14^119741-119741^14 | 137239 | Serge Batalov | 04/2016 |
3252 | 35014^8297+8297^35014 | 137218 | Hans Havermann | 05/2021 |
3253 | (19*2^455760+1)/3455 | 137196 | Lelio R Paula | 07/2015 |
3255 | 124^(2^16)+57^(2^16) | 137195 | Valeryi Kuryshev | 02/2011 |
3254 | 124^65536+57^65536 | 137195 | Serge Batalov | 03/2018 |
3256 | 2^455689+72677 | 137177 | Enzo Doria | 04/2016 |
3257 | (17948!)^2+Prime(17948) | 137118 | Robert Price | 08/2014 |
3258 | 31287^24128+24128^31287 | 137116 | Hans Havermann | 05/2021 |
3259 | (37^87421-1)/36 | 137093 | Robert Price | 03/2012 |
3260 | 36233^6070+6070^36233 | 137077 | Hans Havermann | 05/2021 |
3261 | (8*10^137073-17)/9 | 137073 | Serge Batalov | 11/2022 |
3262 | 38418^3697+3697^38418 | 137070 | Hans Havermann | 04/2021 |
3263 | 2^455323-57 | 137066 | Lelio R Paula | 09/2017 |
3264 | (56*10^137019+583)/9 | 137020 | Robert Price | 08/2021 |
3265 | (73*17^111333-9)/16 | 136991 | Curtis Bright | 05/2015 |
3266 | 2^455025-112723 | 136977 | Enzo Doria | 06/2014 |
3267 | 33876^11039+11039^33876 | 136959 | Hans Havermann | 05/2021 |
3268 | 35142^7873+7873^35142 | 136919 | Hans Havermann | 05/2021 |
3269 | 66*10^136894+7 | 136896 | Robert Price | 07/2020 |
3270 | 2^454675-1777 | 136871 | Yves Minet | 10/2011 |
3271 | 31676^20931+20931^31676 | 136866 | Hans Havermann | 05/2021 |
3272 | 3*10^136829+29 | 136830 | Robert Price | 05/2018 |
3273 | 4*10^136813-57 | 136814 | Robert Price | 10/2018 |
3274 | (6092*28^94536-143)/9 | 136812 | Curtis Bright | 05/2015 |
3275 | 37359^4588+4588^37359 | 136795 | Hans Havermann | 05/2021 |
3276 | 2^454348-53 | 136773 | Lelio R Paula | 09/2017 |
3277 | 31^91680-2 | 136729 | Lelio R Paula | 05/2017 |
3278 | 2^454199-113697 | 136728 | Enzo Doria | 09/2014 |
3279 | 30785^27622+27622^30785 | 136725 | Hans Havermann | 05/2021 |
3280 | 32973^14014+14014^32973 | 136725 | Hans Havermann | 05/2021 |
3282 | 7*10^136716+69 | 136717 | Robert Price | 07/2019 |
3281 | 36002^6273+6273^36002 | 136717 | Hans Havermann | 05/2021 |
3283 | 6*10^136692+53 | 136693 | Robert Price | 05/2020 |
3284 | (13*10^136687+47)/3 | 136688 | Robert Price | 10/2018 |
3285 | 2^453935-2791357 | 136649 | Enzo Doria | 01/2016 |
3286 | 2^453906-69131 | 136640 | Enzo Doria | 11/2015 |
3287 | 33232^12915+12915^33232 | 136620 | Hans Havermann | 05/2021 |
3288 | 2^453791+1873913 | 136605 | Enzo Doria | 06/2016 |
3289 | 34166^9951+9951^34166 | 136592 | Hans Havermann | 05/2021 |
3290 | (21*2^453740-1)/2735 | 136588 | Lelio R Paula | 07/2015 |
3291 | 31102^24635+24635^31102 | 136587 | Hans Havermann | 05/2021 |
3292 | 580^49413+49413^580 | 136550 | Norbert Schneider | 02/2019 |
3293 | 2^453503-2788297 | 136519 | Enzo Doria | 11/2015 |
3294 | 34989^7958+7958^34989 | 136486 | Hans Havermann | 12/2020 |
3295 | (2*10^136484+187)/9 | 136484 | Robert Price | 06/2022 |
3296 | 31007^25158+25158^31007 | 136452 | Hans Havermann | 11/2020 |
3297 | 2^453267-113827 | 136447 | Enzo Doria | 09/2014 |
3298 | 32234^17085+17085^32234 | 136435 | Hans Havermann | 12/2020 |
3299 | 2^453102+1877629 | 136398 | Enzo Doria | 08/2016 |
3300 | 31016^24981+24981^31016 | 136397 | Hans Havermann | 12/2020 |
3301 | (62*10^136384-791)/9 | 136385 | Robert Price | 06/2019 |
3302 | 34171^9798+9798^34171 | 136382 | Hans Havermann | 12/2020 |
3303 | (17*10^136354-113)/3 | 136355 | Robert Price | 06/2021 |
3304 | 32756^14541+14541^32756 | 136350 | Hans Havermann | 11/2020 |
3305 | 32205^17086+17086^32205 | 136313 | Hans Havermann | 12/2020 |
3306 | (25*10^136303+161)/3 | 136304 | Robert Price | 09/2019 |
3307 | 35337^7196+7196^35337 | 136299 | Hans Havermann | 12/2020 |
3308 | (182*10^136291+1)/3 | 136293 | Robert Price | 02/2020 |
3309 | (88*10^136234+83)/9 | 136235 | Robert Price | 03/2022 |
3310 | 23*10^136225-7 | 136227 | Robert Price | 02/2020 |
3311 | L(651821) | 136223 | Henri Lifchitz | 09/2008 |
3312 | 2^452460+77701 | 136205 | Enzo Doria | 05/2016 |
3313 | 2^452440-114755 | 136199 | Enzo Doria | 04/2015 |
3314 | 32286^16489+16489^32286 | 136157 | Hans Havermann | 11/2020 |
3315 | (47*10^136141+493)/9 | 136142 | Robert Price | 03/2019 |
3316 | 40392^2339+2339^40392 | 136082 | Hans Havermann | 12/2020 |
3317 | 2*10^136057-43 | 136058 | Robert Price | 04/2018 |
3318 | (2^451956-5)/181 | 136051 | Lelio R Paula | 07/2015 |
3319 | 2^451947-22165 | 136050 | Enzo Doria | 07/2013 |
3320 | 2^451787-21805 | 136002 | Enzo Doria | 07/2013 |
3321 | 2^451734-112817 | 135986 | Enzo Doria | 06/2014 |
3322 | (11*2^451714+1)/75 | 135979 | Lelio R Paula | 07/2015 |
3323 | 2^451705-21879 | 135977 | Enzo Doria | 07/2013 |
3324 | 2^451560-112349 | 135934 | Enzo Doria | 06/2014 |
3325 | 2^451530+45 | 135925 | Lelio R Paula | 08/2017 |
3326 | 31622^19875+19875^31622 | 135922 | Hans Havermann | 11/2020 |
3327 | (25*10^135906-73)/3 | 135907 | Robert Price | 09/2019 |
3328 | 2^451450-21743 | 135900 | Enzo Doria | 07/2013 |
3329 | (7*10^135879+11)/9 | 135879 | Tyler Busby | 01/2023 |
3330 | 35218^7199+7199^35218 | 135846 | Hans Havermann | 11/2020 |
3331 | 35661^6446+6446^35661 | 135844 | Hans Havermann | 11/2020 |
3332 | 31869^18248+18248^31869 | 135801 | Hans Havermann | 12/2020 |
3333 | (77*10^135789+157)/9 | 135790 | Robert Price | 05/2022 |
3334 | 2^450805+65 | 135706 | Lelio R Paula | 08/2017 |
3335 | 30761^25728+25728^30761 | 135669 | Hans Havermann | 12/2020 |
3336 | 2*10^135663+69 | 135664 | Robert Price | 06/2020 |
3337 | 33962^9867+9867^33962 | 135651 | Hans Havermann | 11/2020 |
3338 | 34474^8605+8605^34474 | 135647 | Hans Havermann | 11/2020 |
3339 | 34501^8508+8508^34501 | 135583 | Hans Havermann | 12/2020 |
3340 | 35487^6614+6614^35487 | 135577 | Hans Havermann | 12/2020 |
3341 | (13725^32768+1)/131074 | 135573 | Lelio R Paula | 03/2012 |
3342 | (313007#+121876)/(2*30469*424867) | 135559 | Makoto Morimoto | 08/2020 |
3343 | (5^193939+1)/6 | 135557 | Paul Bourdelais | 12/2008 |
3344 | (76*10^135553-49)/9 | 135554 | Robert Price | 07/2022 |
3345 | (844*10^135527-7)/9 | 135529 | Robert Price | 05/2021 |
3346 | 40387^2260+2260^40387 | 135463 | Hans Havermann | 12/2020 |
3347 | 2^449944-113247 | 135447 | Enzo Doria | 07/2014 |
3348 | 2^449770-113247 | 135395 | Enzo Doria | 07/2014 |
3349 | 2^449637-21471 | 135355 | Enzo Doria | 07/2013 |
3350 | 2^449571-75 | 135335 | Lelio R Paula | 08/2017 |
3351 | (14*10^135301-53)/3 | 135302 | Robert Price | 12/2018 |
3352 | (3*2^449494+1)/61340334013 | 135301 | Lelio R Paula | 07/2015 |
3353 | (13*10^135279+437)/9 | 135280 | Robert Price | 04/2018 |
3354 | 2^449330-35 | 135262 | Lelio R Paula | 08/2017 |
3355 | (19*2^449325+1)/9 | 135261 | Lelio R Paula | 07/2015 |
3356 | (13*10^135184-43)/3 | 135185 | Robert Price | 11/2018 |
3357 | 2^449049-115309 | 135178 | Enzo Doria | 07/2015 |
3358 | (10^135174+191)/3 | 135174 | Robert Price | 02/2018 |
3359 | 2^449030-15 | 135172 | Lelio R Paula | 08/2017 |
3360 | (157*10^135151-1)/3 | 135153 | Robert Price | 01/2022 |
3361 | (2^448966+100280245065) | 135153 | Paul Bourdelais | 05/2022 |
3362 | (27*2^448936-1)/11 | 135144 | Lelio R Paula | 07/2015 |
3363 | (37*10^135099+251)/9 | 135100 | Robert Price | 09/2021 |
3364 | 32221^15586+15586^32221 | 135095 | Hans Havermann | 12/2020 |
3365 | 2^448762-351401 | 135091 | Enzo Doria | 07/2015 |
3366 | 2*10^135083-43 | 135084 | Robert Price | 04/2018 |
3367 | 31357^20278+20278^31357 | 135056 | Hans Havermann | 12/2020 |
3368 | 32242^15445+15445^32242 | 135055 | Hans Havermann | 12/2020 |
3369 | k(198476) | 135054 | Robert Price | 07/2020 |
3370 | 32461^14470+14470^32461 | 135053 | Hans Havermann | 12/2020 |
3371 | 31353^20288+20288^31353 | 135045 | Hans Havermann | 12/2020 |
3372 | 5*10^135019+77 | 135020 | Robert Price | 12/2018 |
3373 | (10^135011+719)/9 | 135011 | Serge Batalov | 12/2014 |
3374 | (197*10^134978+7)/3 | 134980 | Robert Price | 12/2020 |
3375 | 2^448386-2786261 | 134978 | Enzo Doria | 03/2016 |
3376 | (73*10^134939+143)/9 | 134940 | Robert Price | 07/2019 |
3377 | 33957^9392+9392^33957 | 134903 | Hans Havermann | 12/2020 |
3378 | 2^448113-113949 | 134896 | Enzo Doria | 11/2014 |
3379 | 30958^22755+22755^30958 | 134887 | Hans Havermann | 12/2020 |
3380 | 2^447888-2786639 | 134828 | Enzo Doria | 03/2016 |
3381 | 2^447870-396765 | 134823 | Enzo Doria | 07/2013 |
3382 | 2^447766-21791 | 134791 | Enzo Doria | 07/2013 |
3383 | (19*10^134786-49)/3 | 134787 | Robert Price | 05/2019 |
3384 | Phi(202173,10)/10064306514895399941409 | 134758 | Makoto Kamada | 05/2019 |
3385 | (23*2^447647+1)/155 | 134755 | Lelio R Paula | 07/2015 |
3386 | 2^447552-1019 | 134727 | Yves Minet | 02/2014 |
3387 | (2*10^134720-41)/3 | 134720 | Robert Price | 02/2018 |
3388 | (25*10^134695-97)/9 | 134696 | Robert Price | 01/2022 |
3389 | 2^447437-113569 | 134692 | Enzo Doria | 08/2014 |
3390 | 2^447426-65 | 134689 | Lelio R Paula | 08/2017 |
3391 | 2^447357-2797573 | 134668 | Enzo Doria | 04/2016 |
3392 | 2^447278+93 | 134645 | Lelio R Paula | 08/2017 |
3393 | 33193^11370+11370^33193 | 134623 | Hans Havermann | 12/2020 |
3394 | 30736^23979+23979^30736 | 134619 | Hans Havermann | 11/2020 |
3395 | 2^447094-113193 | 134589 | Enzo Doria | 07/2014 |
3396 | 3^282041-9934 | 134568 | Enzo Doria | 05/2014 |
3397 | 2^447019-109039 | 134567 | Enzo Doria | 04/2014 |
3398 | 31376^19437+19437^31376 | 134561 | Hans Havermann | 12/2020 |
3399 | 2^446990-22041 | 134558 | Enzo Doria | 07/2013 |
3400 | 123^64370+122 | 134528 | Karsten Bonath | 04/2018 |
3401 | 30100^29461+29461^30100 | 134525 | Hans Havermann | 11/2020 |
3402 | 31251^20158+20158^31251 | 134519 | Hans Havermann | 11/2020 |
3403 | 2^446782-39701 | 134495 | Enzo Doria | 09/2015 |
3404 | 31817^16858+16858^31817 | 134485 | Hans Havermann | 12/2020 |
3405 | 32448^13937+13937^32448 | 134471 | Hans Havermann | 12/2020 |
3406 | 2^446494-16485 | 134409 | Enzo Doria | 04/2013 |
3407 | 30042^29785+29785^30042 | 134408 | Hans Havermann | 12/2020 |
3408 | 29504^30069-30069^29504 | 134405 | Norbert Schneider | 12/2014 |
3409 | 2^446441+65 | 134393 | Lelio R Paula | 08/2017 |
3410 | (10^134385+719)/9 | 134385 | Serge Batalov | 12/2014 |
3411 | 30043^29688+29688^30043 | 134370 | Hans Havermann | 12/2020 |
3412 | (2*10^134364+529)/9 | 134364 | Robert Price | 01/2018 |
3413 | 34657^7512+7512^34657 | 134323 | Hans Havermann | 11/2020 |
3414 | (13*2^446187-1)/661 | 134314 | Lelio R Paula | 07/2015 |
3415 | 5^192103+3^192103+2^192103+1 | 134275 | Matthias Baur | 12/2019 |
3416 | 42035^1564+1564^42035 | 134270 | Hans Havermann | 12/2020 |
3418 | (2^446022-7)/339 | 134264 | Lelio R Paula | 07/2015 |
3417 | 30621^24248+24248^30621 | 134264 | Hans Havermann | 12/2020 |
3419 | 30341^26562+26562^30341 | 134237 | Hans Havermann | 11/2020 |
3420 | 10^134209+99867 | 134210 | Patrick De Geest | 05/2021 |
3421 | 10^134209-80000001 | 134209 | Robert Price | 04/2021 |
3422 | 10^134209-323283 | 134209 | Patrick De Geest | 05/2021 |
3423 | 29976^29953+29953^29976 | 134186 | Hans Havermann | 12/2020 |
3424 | 35038^6755+6755^35038 | 134183 | Hans Havermann | 12/2020 |
3425 | 63^74568+2 | 134174 | Lelio R Paula | 06/2017 |
3426 | 2^445671-22071 | 134161 | Enzo Doria | 07/2013 |
3427 | 532^49205+49205^532 | 134129 | Norbert Schneider | 02/2019 |
3428 | 36453^4780+4780^36453 | 134127 | Hans Havermann | 04/2021 |
3429 | (28*10^134122-1)/9 | 134123 | Serge Batalov | 10/2014 |
3430 | 2^445515-113859 | 134114 | Enzo Doria | 10/2014 |
3432 | (22*10^134111-37)/3 | 134112 | Robert Price | 04/2019 |
3431 | 31083^20636+20636^31083 | 134112 | Hans Havermann | 04/2021 |
3433 | 31622^17379+17379^31622 | 134079 | Hans Havermann | 04/2021 |
3434 | (277*10^134059-7)/9 | 134061 | Robert Price | 02/2022 |
3435 | 2^445328-216917 | 134058 | Enzo Doria | 05/2014 |
3436 | 2^445202+1874899 | 134020 | Enzo Doria | 06/2016 |
3437 | (35*10^134003-89)/9 | 134004 | Robert Price | 02/2022 |
3438 | (13*2^445102+1)/17 | 133989 | Lelio R Paula | 07/2015 |
3439 | (35*10^133979-593)/9 | 133980 | Robert Price | 07/2018 |
3440 | 2*10^133955+51 | 133956 | Robert Price | 05/2018 |
3441 | (49*10^133952+437)/9 | 133953 | Robert Price | 09/2021 |
3442 | 2^444964-113639 | 133948 | Enzo Doria | 08/2014 |
3443 | 31811^16240+16240^31811 | 133943 | Hans Havermann | 04/2021 |
3444 | 10^133902+167841 | 133903 | Patrick De Geest | 05/2021 |
3446 | 28118^30097-30097^28118 | 133902 | Norbert Schneider | 01/2015 |
3445 | 10^133902-100001 | 133902 | Robert Price | 07/2020 |
3447 | 2^444784-113859 | 133894 | Enzo Doria | 10/2014 |
3448 | 32303^13914+13914^32303 | 133846 | Hans Havermann | 04/2021 |
3449 | (2276213*2^444444+1)/3 | 133797 | Alex_soldier | 11/2022 |
3450 | (1403559*2^444444+1)/5 | 133797 | Alex_soldier | 11/2022 |
3451 | (1209887*2^444444+1)/9 | 133797 | Alex_soldier | 11/2022 |
3452 | (608239*2^444444+1)/25 | 133796 | Alex_soldier | 11/2022 |
3453 | (1824587*2^444444+1)/27 | 133796 | Alex_soldier | 11/2022 |
3454 | (40795*2^444444+1)/7 | 133795 | Alex_soldier | 11/2022 |
3455 | 30739^22458+22458^30739 | 133757 | Hans Havermann | 04/2021 |
3456 | 34942^6721+6721^34942 | 133739 | Hans Havermann | 04/2021 |
3457 | (2^444046+100280245065) | 133672 | Paul Bourdelais | 05/2022 |
3458 | 34792^6935+6935^34792 | 133638 | Hans Havermann | 04/2021 |
3459 | (266*10^133603+1)/3 | 133605 | Robert Price | 04/2020 |
3460 | 32261^13842+13842^32261 | 133600 | Hans Havermann | 04/2021 |
3461 | (89*10^133580+1)/9 | 133581 | Serge Batalov | 05/2010 |
3462 | (134*10^133573-11)/3 | 133575 | Robert Price | 01/2022 |
3463 | 62^74521-61^74521 | 133571 | Robert Price | 05/2013 |
3464 | (182*10^133543+1)/3 | 133545 | Robert Price | 02/2020 |
3465 | (103*10^133535+11)/3 | 133537 | Robert Price | 01/2021 |
3466 | 32589^12520+12520^32589 | 133537 | Hans Havermann | 03/2021 |
3467 | 34516^7373+7373^34516 | 133496 | Hans Havermann | 04/2021 |
3468 | 8*10^133487-37 | 133488 | Robert Price | 03/2022 |
3469 | 30135^26882+26882^30135 | 133482 | Hans Havermann | 04/2021 |
3470 | 2^443198-1867301 | 133416 | Enzo Doria | 03/2016 |
3471 | (19*10^133390+101)/3 | 133391 | Robert Price | 09/2019 |
3472 | (71^72043-1)/70 | 133369 | Paul Bourdelais | 09/2017 |
3473 | 36117^4910+4910^36117 | 133311 | Hans Havermann | 04/2021 |
3474 | 2^442799+1874633 | 133296 | Enzo Doria | 06/2016 |
3475 | L(637751) | 133283 | Henri Lifchitz | 09/2008 |
3476 | 109^65410-2 | 133269 | Lelio R Paula | 10/2017 |
3477 | 2^442688-113489 | 133263 | Enzo Doria | 08/2014 |
3478 | (7*2^442640-1)/783 | 133246 | Lelio R Paula | 07/2015 |
3479 | (9*2^442463+1)/17441 | 133192 | Lelio R Paula | 07/2015 |
3480 | 2^442437-1849993 | 133187 | Enzo Doria | 08/2015 |
3481 | 2^442430-2791721 | 133185 | Enzo Doria | 03/2016 |
3482 | (13*2^442428-1)/309 | 133183 | Lelio R Paula | 07/2015 |
3483 | 29959^27870+27870^29959 | 133172 | Hans Havermann | 03/2021 |
3484 | (25*2^442379-1)/71 | 133169 | Lelio R Paula | 07/2015 |
3485 | 34240^7737+7737^34240 | 133145 | Hans Havermann | 03/2021 |
3486 | 452^50145+50145^452 | 133142 | Norbert Schneider | 09/2020 |
3487 | 30659^21796+21796^30659 | 133011 | Hans Havermann | 04/2021 |
3488 | 33276^9935+9935^33276 | 133010 | Hans Havermann | 04/2021 |
3489 | 30111^26122+26122^30111 | 133001 | Hans Havermann | 04/2021 |
3490 | 30790^20869+20869^30790 | 132998 | Hans Havermann | 04/2021 |
3492 | (2^441799+78557)/5 | 132995 | Lelio R Paula | 07/2015 |
3491 | 8*10^132994-27 | 132995 | Robert Price | 10/2021 |
3493 | (109*10^132992+11)/3 | 132994 | Robert Price | 06/2022 |
3494 | 2^441781-2787883 | 132990 | Enzo Doria | 03/2016 |
3495 | (3*2^441685+1)/749 | 132959 | Lelio R Paula | 07/2015 |
3496 | 2^441618+37 | 132941 | Lelio R Paula | 08/2017 |
3497 | 34857^6514+6514^34857 | 132940 | Hans Havermann | 04/2021 |
3498 | 34065^7988+7988^34065 | 132937 | Hans Havermann | 04/2021 |
3499 | 35571^5452+5452^35571 | 132914 | Hans Havermann | 04/2021 |
3500 | 2^441521-113575 | 132912 | Enzo Doria | 08/2014 |