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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Rank |
Probable prime |
Digits (> 50000) |
Who ? |
When ? |
3501 | (28*10^150294+41)/3 | 150295 | Robert Price | 07/2021 |
3502 | 2^499225+49727 | 150282 | Enzo Doria | 09/2016 |
3503 | (695*10^150274+7)/9 | 150276 | Robert Price | 12/2021 |
3504 | 2^499054-29261 | 150231 | Enzo Doria | 07/2015 |
3505 | 18580^35187+35187^18580 | 150215 | Norbert Schneider | 10/2023 |
3506 | (844*10^150196-7)/9 | 150198 | Robert Price | 05/2021 |
3507 | 2^498907-933075 | 150186 | Paul Bourdelais | 06/2021 |
3508 | (2^498898-7)/9 | 150183 | Lelio R Paula | 10/2015 |
3509 | 3*10^150182+17 | 150183 | Robert Price | 07/2018 |
3510 | 5*10^150175+63 | 150176 | Robert Price | 09/2020 |
3511 | 29273^33618-33618^29273 | 150154 | Frank Doornink | 06/2024 |
3512 | 32363^33292+33292^32363 | 150149 | Norbert Schneider | 07/2022 |
3513 | 32^99753-99753^32 | 150144 | Henri Lifchitz | 08/2024 |
3514 | (77*10^150128+67)/9 | 150129 | Robert Price | 12/2021 |
3515 | (7*10^(2*75062+1)-9*10^75062-7)/9 | 150125 | Robert Price | 12/2023 |
3516 | 2^498623+1866983 | 150101 | Enzo Doria | 03/2016 |
3517 | 33194^33194-213^213 | 150073 | Serge Batalov | 04/2024 |
3518 | 27868^33759-33759^27868 | 150063 | Frank Doornink | 06/2024 |
3519 | (25*10^150050-403)/9 | 150051 | Robert Price | 12/2020 |
3520 | numbpart(18140942830) | 150033 | Serge Batalov | 04/2017 |
3521 | 10^150029+4381 | 150030 | Patrick De Geest | 05/2016 |
3522 | 10^150029-41 | 150029 | Serge Batalov | 12/2014 |
3523 | 33185^33185+618^618 | 150028 | Serge Batalov | 04/2024 |
3524 | 9*34^97952+529 | 150013 | Eric Chen | 08/2023 |
3525 | 10^150000+1158603 | 150001 | Patrick De Geest | 09/2018 |
3526 | 10^150000-245703 | 150000 | Patrick De Geest | 09/2018 |
3527 | (38*10^149999+691)/9 | 150000 | Robert Price | 10/2018 |
3528 | 2043563126843649194^8192+2043563126843649185^8192 | 150000 | Youcef Lemsafer | 01/2023 |
3529 | (2043563126843649232^8192+2043563126843649201^8192)/147457 | 149994 | Youcef Lemsafer | 01/2023 |
3530 | 2^498238-53 | 149985 | Lelio R Paula | 12/2017 |
3531 | 45728^1905+1905^45728 | 149984 | Hans Havermann | 10/2020 |
3532 | (211^65024+1)/(211^512+1) | 149945 | Martin Hopf | 12/2023 |
3533 | 5*10^149907+23 | 149908 | Robert Price | 03/2019 |
3534 | 32^99585-829 | 149891 | Eric Chen | 11/2023 |
3535 | 39347^6442+6442^39347 | 149874 | Hans Havermann | 09/2020 |
3536 | 2^497850+81049 | 149868 | Enzo Doria | 07/2016 |
3537 | V(1075416) | 149830 | Serge Batalov | 07/2024 |
3538 | 37228^10575+10575^37228 | 149816 | Hans Havermann | 10/2020 |
3539 | (5*2^497673+1)/2743 | 149812 | Lelio R Paula | 10/2015 |
3540 | (5*2^497671+1)/373703 | 149810 | Lelio R Paula | 10/2015 |
3541 | (2*10^149803-143)/3 | 149803 | Robert Price | 03/2018 |
3542 | 33845^26604+26604^33845 | 149763 | Hans Havermann | 09/2020 |
3543 | 2^497434-2784191 | 149743 | Enzo Doria | 10/2015 |
3544 | (865*10^149737-1)/9 | 149739 | Robert Price | 04/2020 |
3545 | 10^149695-7000001 | 149695 | Robert Price | 06/2021 |
3546 | 38237^8214+8214^38237 | 149681 | Hans Havermann | 09/2020 |
3547 | (23*10^149655+19)/3 | 149656 | Robert Price | 07/2019 |
3548 | 2^497068-113579 | 149633 | Enzo Doria | 08/2014 |
3549 | 2^497037+73727 | 149624 | Enzo Doria | 04/2016 |
3550 | 11*10^149618+3 | 149620 | Robert Price | 07/2021 |
3551 | 34942^19067+19067^34942 | 149562 | Hans Havermann | 09/2020 |
3552 | 33696^27449+27449^33696 | 149561 | Hans Havermann | 09/2020 |
3553 | 2^496773+77747 | 149544 | Enzo Doria | 05/2016 |
3554 | 29937^33400-33400^29937 | 149506 | Frank Doornink | 06/2024 |
3555 | (7*10^149483-493)/9 | 149483 | Robert Price | 04/2021 |
3556 | (206*10^149459+7)/3 | 149461 | Robert Price | 07/2020 |
3557 | 34589^20940+20940^34589 | 149459 | Hans Havermann | 09/2020 |
3558 | 2^496477-113485 | 149455 | Enzo Doria | 08/2014 |
3559 | 3*2^496411-5 | 149436 | Jon Grantham | 07/2023 |
3560 | ((10^74703-1)*10000/9+7481)*10^74703+(10^74703-1)/9 | 149410 | Hans Havermann | 09/2019 |
3561 | 2^496270-49451 | 149393 | Enzo Doria | 10/2015 |
3562 | 2^496238-1865081 | 149383 | Enzo Doria | 01/2016 |
3563 | 33831^26030+26030^33831 | 149380 | Hans Havermann | 09/2020 |
3564 | 34131^23780+23780^34131 | 149365 | Hans Havermann | 09/2020 |
3565 | (5*10^149335-53)/3 | 149336 | Robert Price | 09/2020 |
3566 | 26043^33818-33818^26043 | 149330 | Frank Doornink | 03/2024 |
3567 | 2^495968-1853699 | 149302 | Enzo Doria | 09/2015 |
3568 | 2^495935-4117 | 149292 | Yves Minet | 02/2018 |
3569 | 5*2^495930+3 | 149291 | Jon Grantham | 07/2023 |
3570 | 35816^14709+14709^35816 | 149267 | Hans Havermann | 09/2020 |
3571 | (10^149264+7)/191/2683/80557 | 149254 | Alfred Reich | 07/2021 |
3572 | 10^149240-40000001 | 149240 | Robert Price | 07/2022 |
3573 | 10^149240-10809 | 149240 | Alfred Reich | 08/2024 |
3574 | 2^495712-396765 | 149225 | Enzo Doria | 07/2013 |
3575 | (21*2^495676-1)/4835 | 149211 | Lelio R Paula | 10/2015 |
3576 | 2^495420+1880701 | 149137 | Enzo Doria | 10/2016 |
3577 | 25646^33823-33823^25646 | 149127 | Frank Doornink | 02/2024 |
3578 | 2^495337-1847293 | 149112 | Enzo Doria | 07/2015 |
3579 | (2^495193-7)/5 | 149068 | Lelio R Paula | 10/2015 |
3580 | 2^495163+111546435 | 149059 | Paul Bourdelais | 10/2021 |
3581 | 33282^30097+30097^33282 | 149055 | Hans Havermann | 09/2020 |
3582 | 37384^9705+9705^37384 | 149050 | Hans Havermann | 09/2020 |
3583 | 34808^19143+19143^34808 | 149049 | Hans Havermann | 09/2020 |
3584 | 413^56963-412^56963 | 149013 | Jean-Louis Charton | 08/2012 |
3585 | 30657^33212-33212^30657 | 149007 | Frank Doornink | 06/2024 |
3586 | 47^89113-46^89113 | 149006 | Robert Price | 10/2012 |
3587 | V(891190) | 148997 | Serge Batalov | 07/2024 |
3588 | 2^494916+87855 | 148985 | Lelio R Paula | 01/2016 |
3589 | 6*10^148982+73 | 148983 | Robert Price | 04/2019 |
3590 | 3^312155-4 | 148936 | Anonymous | 02/2023 |
3591 | 10^148934+1530019 | 148935 | Patrick De Geest | 02/2021 |
3592 | 10^148934-1000000001 | 148934 | Robert Price | 11/2020 |
3593 | 10^148934-512057 | 148934 | Patrick De Geest | 02/2021 |
3594 | 39000^6571+6571^39000 | 148888 | Hans Havermann | 10/2020 |
3595 | 2^494586-2791991 | 148886 | Enzo Doria | 02/2016 |
3596 | 8*10^148860-3 | 148861 | Ray Chandler | 04/2011 |
3597 | 38262^7769+7769^38262 | 148854 | Hans Havermann | 10/2020 |
3598 | 10^148816-500001 | 148816 | Robert Price | 03/2022 |
3599 | (53*10^148811-287)/9 | 148812 | Robert Price | 02/2022 |
3600 | 2^494333-286183 | 148810 | Enzo Doria | 06/2015 |
3601 | 2^494144-264119 | 148753 | Enzo Doria | 05/2014 |
3602 | 6*10^148734+47 | 148735 | Robert Price | 06/2022 |
3603 | 28724^33353-33353^28724 | 148696 | Frank Doornink | 06/2024 |
3604 | 36502^11823+11823^36502 | 148663 | Hans Havermann | 11/2020 |
3605 | (5*2^493838-1)/3721 | 148658 | Lelio R Paula | 10/2015 |
3606 | 64239^206+206^64239 | 148641 | Hans Havermann | 10/2020 |
3607 | (23*2^493761-1)/555 | 148636 | Lelio R Paula | 10/2015 |
3608 | (23*10^148627-137)/3 | 148628 | Robert Price | 08/2021 |
3609 | (151*10^148601-1)/3 | 148603 | Robert Price | 03/2020 |
3610 | 2^493636+82081 | 148600 | Enzo Doria | 09/2016 |
3611 | ((((((((((((((34251^2-2)^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 | 148593 | Serge Batalov | 07/2016 |
3612 | 27134^33509-33509^27134 | 148563 | Frank Doornink | 01/2024 |
3613 | 177487#+(519643#)/(177487#) | 148558 | Makoto Morimoto | 11/2017 |
3614 | (2*10^148460-23)/3 | 148460 | Robert Price | 04/2018 |
3615 | (28*10^148445+101)/3 | 148446 | Robert Price | 09/2020 |
3616 | 36203^12556+12556^36203 | 148391 | Hans Havermann | 10/2020 |
3617 | 33912^23749+23749^33912 | 148387 | Hans Havermann | 10/2020 |
3618 | (8*10^148328+1)/9 | 148328 | Serge Batalov | 05/2010 |
3619 | 34294^21117+21117^34294 | 148309 | Hans Havermann | 10/2020 |
3620 | (71*10^148306-539)/9 | 148307 | Robert Price | 07/2019 |
3621 | 30814^33039-33039^30814 | 148304 | Frank Doornink | 06/2024 |
3622 | 38042^7875+7875^38042 | 148222 | Hans Havermann | 10/2020 |
3623 | 5^211959-12874 | 148153 | Enzo Doria | 05/2014 |
3624 | 34142^21831+21831^34142 | 148145 | Hans Havermann | 10/2020 |
3625 | 10^148112+34059 | 148113 | Patrick De Geest | 05/2021 |
3626 | 10^148112-70000001 | 148112 | Robert Price | 03/2021 |
3627 | 10^148112-106593 | 148112 | Patrick De Geest | 05/2021 |
3628 | 36303^12016+12016^36303 | 148108 | Hans Havermann | 10/2020 |
3629 | (77*10^148089-149)/9 | 148090 | Robert Price | 03/2022 |
3630 | (16*10^148071+41)/3 | 148072 | Robert Price | 03/2019 |
3631 | 187^65175-2 | 148068 | Lelio R Paula | 11/2017 |
3632 | 2^491851+1871453 | 148062 | Enzo Doria | 05/2016 |
3633 | (68*10^148060-257)/9 | 148061 | Robert Price | 07/2019 |
3634 | (151*10^148020-1)/3 | 148022 | Robert Price | 03/2020 |
3635 | 39153^6032+6032^39153 | 148017 | Hans Havermann | 10/2020 |
3636 | 36798^10507+10507^36798 | 147983 | Hans Havermann | 12/2020 |
3637 | (26*10^147973-23)/3 | 147974 | Robert Price | 12/2019 |
3638 | 2^491521-1865323 | 147963 | Enzo Doria | 02/2016 |
3639 | (2^491476+7)/71 | 147948 | Lelio R Paula | 10/2015 |
3640 | 2*10^147928+47 | 147929 | Robert Price | 12/2021 |
3641 | 2^491391-7807 | 147924 | Lelio R Paula | 01/2013 |
3642 | 39736^5279+5279^39736 | 147920 | Hans Havermann | 11/2020 |
3643 | 2^491370-113297 | 147918 | Enzo Doria | 07/2014 |
3644 | (32760^32760+32759^32759)/95546586737133567708319 | 147900 | Robert Price | 07/2016 |
3645 | 44368^2155+2155^44368 | 147899 | Hans Havermann | 12/2020 |
3646 | (17*10^147890+79)/3 | 147891 | Robert Price | 04/2019 |
3647 | 94*10^147871-3 | 147873 | Robert Price | 05/2020 |
3648 | 10^147843+620967 | 147844 | Patrick De Geest | 05/2021 |
3649 | 10^147843-50000000001 | 147843 | Robert Price | 12/2020 |
3650 | 10^147843-182891 | 147843 | Patrick De Geest | 05/2021 |
3651 | 35805^13346+13346^35805 | 147709 | Hans Havermann | 11/2020 |
3652 | 2^490672+255255 | 147707 | Paul Bourdelais | 10/2021 |
3653 | 2^490660-17 | 147704 | Lelio R Paula | 12/2017 |
3654 | (229*10^147699-1)/3 | 147701 | Robert Price | 07/2020 |
3655 | 40656^4289+4289^40656 | 147678 | Hans Havermann | 11/2020 |
3656 | 2^490550+1179439 | 147671 | Enzo Doria | 06/2016 |
3657 | 27249^33292-33292^27249 | 147662 | Frank Doornink | 06/2024 |
3658 | (23*10^147649-59)/9 | 147650 | Robert Price | 05/2018 |
3659 | 2^490303+2793653 | 147596 | Enzo Doria | 03/2016 |
3660 | 2^490266+255255 | 147585 | Paul Bourdelais | 10/2021 |
3661 | 199^64181-2 | 147543 | Lelio R Paula | 11/2017 |
3662 | 32849^30958+30958^32849 | 147518 | Hans Havermann | 11/2020 |
3663 | 2^489871-286987 | 147466 | Enzo Doria | 07/2015 |
3664 | 2^489864-351899 | 147464 | Enzo Doria | 07/2015 |
3665 | 175^65724-2 | 147422 | Lelio R Paula | 11/2017 |
3666 | 2^489712+1874851 | 147419 | Enzo Doria | 06/2016 |
3667 | 34473^18830+18830^34473 | 147367 | Hans Havermann | 11/2020 |
3668 | 63^81896-2 | 147359 | Lelio R Paula | 10/2017 |
3669 | 34580^18237+18237^34580 | 147344 | Hans Havermann | 11/2020 |
3670 | (11*10^147313-107)/3 | 147314 | Robert Price | 09/2018 |
3671 | (397*10^147310+17)/9 | 147312 | Robert Price | 03/2022 |
3672 | 2^489305-59815 | 147296 | Enzo Doria | 10/2015 |
3673 | (2^489280-7)/6381 | 147285 | Lelio R Paula | 09/2015 |
3674 | 2*10^147264-61 | 147265 | Robert Price | 10/2021 |
3675 | 2*10^147260+29 | 147261 | Robert Price | 02/2021 |
3676 | 33556^24457+24457^33556 | 147258 | Hans Havermann | 11/2020 |
3677 | 2^489125+80357 | 147242 | Enzo Doria | 06/2016 |
3678 | 10^147240-40000001 | 147240 | Robert Price | 07/2022 |
3679 | 10^147240-371331 | 147240 | Alfred Reich | 09/2024 |
3680 | 10^147240-464727 | 147240 | Alfred Reich | 09/2024 |
3681 | 32835^30452+30452^32835 | 147220 | Hans Havermann | 12/2020 |
3682 | (19*10^147213-97)/3 | 147214 | Robert Price | 10/2021 |
3683 | 27123^33190-33190^27123 | 147143 | Frank Doornink | 01/2024 |
3684 | (148*10^147139-1)/3 | 147141 | Robert Price | 03/2020 |
3685 | 34338^19255+19255^34338 | 147123 | Hans Havermann | 11/2020 |
3686 | 2^488648-112799 | 147098 | Enzo Doria | 07/2014 |
3687 | 2^488627-350317 | 147092 | Enzo Doria | 06/2015 |
3688 | 33432^25075+25075^33432 | 147076 | Hans Havermann | 12/2020 |
3689 | (2^488441-1)/(61543567*30051203516986199) | 147012 | Dario Alpern | 12/2014 |
3690 | 2^488280-2165 | 146987 | Yves Minet | 07/2014 |
3691 | 2^488278+45 | 146987 | Lelio R Paula | 12/2017 |
3692 | 32568^32568+32561^32561 | 146973 | Henri Lifchitz | 08/2024 |
3693 | 2^487927-39 | 146881 | Lelio R Paula | 12/2017 |
3694 | (7*10^146860-13)/3 | 146861 | Robert Price | 07/2018 |
3695 | (26*10^146856-77)/3 | 146857 | Robert Price | 11/2019 |
3696 | 32948^28611+28611^32948 | 146834 | Hans Havermann | 11/2020 |
3697 | 42596^2799+2799^42596 | 146829 | Hans Havermann | 12/2020 |
3698 | 2^487726-1863341 | 146821 | Enzo Doria | 12/2015 |
3699 | 43838^2229+2229^43838 | 146775 | Hans Havermann | 11/2020 |
3700 | 35005^15594+15594^35005 | 146775 | Hans Havermann | 11/2020 |
3701 | (167*10^146764+7)/3 | 146766 | Robert Price | 04/2021 |
3702 | 53^85114+85114 | 146761 | Kellen Shenton | 05/2022 |
3703 | (59*10^146738+157)/9 | 146739 | Robert Price | 12/2021 |
3704 | ((10^73362-1)*10000/9+6701)*10^73362+(10^73362-1)/9 | 146728 | Hans Havermann | 09/2019 |
3705 | 32963^28234+28234^32963 | 146711 | Hans Havermann | 12/2020 |
3706 | (22*10^146661-19)/3 | 146662 | Robert Price | 04/2019 |
3707 | 33958^20825+20825^33958 | 146651 | Hans Havermann | 12/2020 |
3708 | 26289^33178-33178^26289 | 146640 | Frank Doornink | 03/2024 |
3709 | 2^487121-39523 | 146639 | Enzo Doria | 09/2015 |
3710 | 61063^252+252^61063 | 146637 | Hans Havermann | 12/2020 |
3711 | (7*2^486967+1)/39 | 146591 | Lelio R Paula | 09/2015 |
3712 | 34099^19900+19900^34099 | 146587 | Hans Havermann | 11/2020 |
3713 | 2^486893-79 | 146570 | Yves Minet | 09/2017 |
3714 | 36818^9567+9567^36818 | 146565 | Hans Havermann | 12/2020 |
3715 | 2^486840+1879141 | 146554 | Enzo Doria | 08/2016 |
3716 | 2^486774-87 | 146534 | Lelio R Paula | 12/2017 |
3717 | 38655^6176+6176^38655 | 146530 | Hans Havermann | 11/2020 |
3718 | 8*10^146522-81 | 146523 | Robert Price | 02/2021 |
3719 | 32820^29059+29059^32820 | 146485 | Hans Havermann | 12/2020 |
3720 | 37261^8530+8530^37261 | 146472 | Hans Havermann | 12/2020 |
3721 | 66953^154+154^66953 | 146462 | Hans Havermann | 12/2020 |
3722 | 96^73877-95^73877 | 146445 | Robert Price | 10/2015 |
3723 | 8*10^146421+81 | 146422 | Robert Price | 08/2019 |
3724 | 33153^26090+26090^33153 | 146420 | Hans Havermann | 11/2020 |
3725 | 2^486275+23961 | 146384 | Enzo Doria | 10/2023 |
3726 | (52^85259+1)/53 | 146304 | Paul Bourdelais | 09/2017 |
3727 | 179^64935+2 | 146290 | Lelio R Paula | 10/2017 |
3728 | 32595^30758+30758^32595 | 146285 | Hans Havermann | 11/2020 |
3729 | 34972^15157+15157^34972 | 146205 | Hans Havermann | 12/2020 |
3730 | (16*10^146200+131)/3 | 146201 | Robert Price | 03/2022 |
3731 | (19*10^146181-49)/3 | 146182 | Robert Price | 05/2019 |
3732 | 2^485531-114621 | 146160 | Enzo Doria | 05/2015 |
3733 | 2^485473-933075 | 146142 | Paul Bourdelais | 06/2021 |
3734 | (2^485461-9)/4249 | 146135 | Lelio R Paula | 09/2015 |
3735 | (22*10^146130-193)/9 | 146131 | Robert Price | 07/2022 |
3736 | 2^485389+81887 | 146117 | Enzo Doria | 08/2016 |
3737 | 32554^30773+30773^32554 | 146108 | Hans Havermann | 11/2020 |
3738 | 28075^32844-32844^28075 | 146101 | Frank Doornink | 06/2024 |
3739 | (10^146063+71)/9 | 146063 | Serge Batalov | 07/2015 |
3740 | 2*10^146051-63 | 146052 | Robert Price | 01/2022 |
3741 | (2^485119+7)/2745 | 146032 | Lelio R Paula | 09/2015 |
3742 | (22*10^146029+257)/9 | 146030 | Robert Price | 06/2018 |
3743 | 7*10^145982-53 | 145983 | Robert Price | 06/2020 |
3744 | 2^484743+1872923 | 145923 | Enzo Doria | 05/2016 |
3745 | 33140^25287+25287^33140 | 145913 | Hans Havermann | 01/2021 |
3746 | 37875^7112+7112^37875 | 145895 | Hans Havermann | 01/2021 |
3747 | 30542^32529-32529^30542 | 145890 | Frank Doornink | 06/2024 |
3748 | 32862^27473+27473^32862 | 145872 | Hans Havermann | 01/2021 |
3749 | V(1046652)/2093303 | 145817 | Serge Batalov | 07/2024 |
3750 | 32836^27587+27587^32836 | 145815 | Hans Havermann | 01/2021 |