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 ? |
4001 | 2^466829-459523 | 140530 | Enzo Doria | 05/2015 |
4002 | 2^466692-113213 | 140489 | Enzo Doria | 07/2014 |
4003 | 23*10^140464-3 | 140466 | Robert Price | 10/2021 |
4004 | (2*10^140461-17)/3 | 140461 | Serge Batalov | 11/2022 |
4005 | 31335^30364+30364^31335 | 140455 | Hans Havermann | 05/2021 |
4006 | 28511^31524-31524^28511 | 140440 | Frank Doornink | 06/2024 |
4007 | 32795^19126+19126^32795 | 140416 | Hans Havermann | 05/2021 |
4008 | (44*10^140410-503)/9 | 140411 | Robert Price | 12/2018 |
4009 | 28332^31535-31535^28332 | 140403 | Frank Doornink | 06/2024 |
4010 | 153^64265-2 | 140400 | Lelio R Paula | 11/2017 |
4011 | 30323^31322-31322^30323 | 140379 | Frank Doornink | 06/2024 |
4012 | (112*10^140357-1)/3 | 140359 | Serge Batalov | 12/2014 |
4013 | (29*10^140337-17)/3 | 140338 | Robert Price | 09/2019 |
4014 | 2^466181-112735 | 140335 | Enzo Doria | 07/2014 |
4015 | (16*10^140290-37)/3 | 140291 | Robert Price | 05/2021 |
4016 | (5*10^140281-119)/3 | 140282 | Robert Price | 03/2018 |
4017 | 34568^11415+11415^34568 | 140259 | Hans Havermann | 05/2021 |
4018 | (27*2^465872+1)/691 | 140241 | Lelio R Paula | 08/2015 |
4019 | 33632^14781+14781^33632 | 140236 | Hans Havermann | 05/2021 |
4020 | 31803^25670+25670^31803 | 140233 | Hans Havermann | 05/2021 |
4021 | 2^465803-114817 | 140221 | Enzo Doria | 05/2015 |
4022 | floor(Pi*10^140344)%10^140165 | 140165 | Serge Batalov | 08/2012 |
4023 | 2^465503-112735 | 140131 | Enzo Doria | 07/2014 |
4024 | (16*10^140091+167)/3 | 140092 | Robert Price | 06/2019 |
4025 | (8*10^140087-137)/3 | 140088 | Robert Price | 03/2022 |
4026 | 6^179964+179964^6-1 | 140040 | Robert Price | 04/2014 |
4027 | (89*10^140008-179)/9 | 140009 | Robert Price | 12/2019 |
4028 | (29*2^465077-1)/9 | 140003 | Lelio R Paula | 08/2015 |
4029 | 2^465072-344789 | 140001 | Enzo Doria | 07/2015 |
4030 | 34742^10683+10683^34742 | 139965 | Hans Havermann | 05/2021 |
4031 | 5*10^139945+81 | 139946 | Robert Price | 03/2019 |
4032 | 32648^19335+19335^32648 | 139941 | Hans Havermann | 05/2021 |
4033 | 2^464864-17 | 139939 | Lelio R Paula | 09/2017 |
4034 | 8*10^139920+51 | 139921 | Robert Price | 08/2019 |
4035 | (85*10^139913-1)/3 | 139915 | Robert Price | 02/2020 |
4036 | 31203^30436+30436^31203 | 139896 | Hans Havermann | 04/2021 |
4037 | 2^464642+22189 | 139872 | Enzo Doria | 09/2023 |
4038 | 26138^31663-31663^26138 | 139865 | Frank Doornink | 03/2024 |
4039 | (16^116139+619)/5 | 139845 | Anonymous | 08/2022 |
4040 | (2^464556+619)/5 | 139845 | Eric Chen | 10/2023 |
4041 | 4*10^139839-27 | 139840 | Robert Price | 08/2021 |
4042 | 33582^14573+14573^33582 | 139821 | Hans Havermann | 05/2021 |
4043 | (17^113621+1)/18 | 139804 | Paul Bourdelais | 09/2011 |
4045 | 2*10^139800-21 | 139801 | Robert Price | 09/2020 |
4044 | 32628^19261+19261^32628 | 139801 | Hans Havermann | 04/2021 |
4046 | (13*10^139782+191)/3 | 139783 | Robert Price | 11/2018 |
4047 | (64*10^139776+791)/9 | 139777 | Robert Price | 01/2022 |
4048 | (695*10^139772+7)/9 | 139774 | Robert Price | 12/2021 |
4049 | (19*2^464312-1)/3 | 139773 | Lelio R Paula | 08/2015 |
4050 | (74*10^139723+133)/9 | 139724 | Robert Price | 06/2019 |
4051 | 3*10^139722+13 | 139723 | Robert Price | 07/2018 |
4052 | 31577^26592+26592^31577 | 139721 | Hans Havermann | 05/2021 |
4053 | 77*10^139692+3 | 139694 | Robert Price | 06/2020 |
4054 | (31*2^463970+1)/5 | 139670 | Lelio R Paula | 08/2015 |
4055 | (18203^(2^15)+(18201)^(2^15))/2 | 139597 | Robert Price | 05/2018 |
4056 | 39640^3321+3321^39640 | 139584 | Hans Havermann | 05/2021 |
4057 | 36663^6410+6410^36663 | 139571 | Hans Havermann | 05/2021 |
4058 | 2^463633-2788423 | 139568 | Enzo Doria | 11/2015 |
4059 | 33659^13978+13978^33659 | 139532 | Hans Havermann | 05/2021 |
4060 | 31811^24318+24318^31811 | 139521 | Hans Havermann | 04/2021 |
4061 | 34149^12172+12172^34149 | 139512 | Hans Havermann | 04/2021 |
4062 | (29*10^139476+313)/9 | 139477 | Robert Price | 04/2021 |
4063 | 31721^24940+24940^31721 | 139474 | Hans Havermann | 05/2021 |
4064 | 32833^17698+17698^32833 | 139473 | Hans Havermann | 05/2021 |
4065 | 2^463271-109501 | 139459 | Enzo Doria | 04/2014 |
4066 | (5*10^139457+79)/3 | 139458 | Robert Price | 03/2018 |
4067 | 2^463237-99 | 139449 | Lelio R Paula | 09/2017 |
4068 | (49*10^139442+383)/9 | 139443 | Robert Price | 04/2019 |
4069 | 31155^29902+29902^31155 | 139441 | Hans Havermann | 05/2021 |
4070 | (7*10^139417-547)/9 | 139417 | Robert Price | 01/2018 |
4071 | 29636^31175-31175^29636 | 139409 | Frank Doornink | 05/2024 |
4072 | (10^139398+191)/3 | 139398 | Robert Price | 02/2018 |
4073 | 23*10^139386-3 | 139388 | Robert Price | 10/2021 |
4074 | 2^463019+79463 | 139383 | Enzo Doria | 06/2016 |
4075 | 3^292129-112756 | 139381 | Enzo Doria | 07/2014 |
4076 | (15*2^462951+1)/527 | 139361 | Lelio R Paula | 08/2015 |
4077 | 31922^23205+23205^31922 | 139359 | Hans Havermann | 05/2021 |
4078 | (19*10^139336+503)/9 | 139337 | Alfred Reich | 11/2023 |
4080 | 2^462855-1865707 | 139334 | Enzo Doria | 02/2016 |
4079 | 31237^28876+28876^31237 | 139334 | Hans Havermann | 05/2021 |
4081 | (86*10^139315+121)/9 | 139316 | Robert Price | 08/2019 |
4082 | 2^462786-292043 | 139313 | Enzo Doria | 08/2015 |
4083 | 38915^3798+3798^38915 | 139299 | Hans Havermann | 05/2021 |
4085 | (26*10^139289+1)/9 | 139290 | Serge Batalov | 05/2010 |
4084 | (17*10^139289+7)/3 | 139290 | Robert Price | 06/2023 |
4086 | 34065^12248+12248^34065 | 139260 | Hans Havermann | 05/2021 |
4087 | 36425^6654+6654^36425 | 139256 | Hans Havermann | 05/2021 |
4088 | 39252^3527+3527^39252 | 139243 | Hans Havermann | 05/2021 |
4089 | (17*10^139239+67)/3 | 139240 | Robert Price | 01/2019 |
4090 | 31887^23248+23248^31887 | 139231 | Hans Havermann | 05/2021 |
4091 | (25*10^139210-97)/9 | 139211 | Robert Price | 01/2022 |
4092 | 2^462238-935 | 139148 | Yves Minet | 02/2014 |
4093 | (29*10^139134-119)/9 | 139135 | Robert Price | 12/2021 |
4094 | U(687859)/4127153 | 139105 | Serge Batalov | 07/2024 |
4095 | (109*10^139100-7)/3 | 139102 | Robert Price | 03/2021 |
4096 | 38744^3885+3885^38744 | 139068 | Hans Havermann | 05/2021 |
4097 | 31112^29499+29499^31112 | 139065 | Hans Havermann | 05/2021 |
4098 | 2*10^139043-63 | 139044 | Robert Price | 01/2022 |
4099 | 36390^6613+6613^36390 | 139025 | Hans Havermann | 04/2021 |
4100 | 30554^30989-30989^30554 | 138988 | Frank Doornink | 05/2024 |
4101 | 2*10^138975+33 | 138976 | Robert Price | 11/2021 |
4102 | 42437^1882+1882^42437 | 138966 | Hans Havermann | 05/2021 |
4103 | 32151^20990+20990^32151 | 138958 | Hans Havermann | 05/2021 |
4104 | 32154^20933+20933^32154 | 138933 | Hans Havermann | 04/2021 |
4105 | 31082^29499+29499^31082 | 138931 | Hans Havermann | 04/2021 |
4106 | 30573^30962-30962^30573 | 138876 | Frank Doornink | 05/2024 |
4107 | 2^461228+1870441 | 138844 | Enzo Doria | 05/2016 |
4108 | 2^461204-113675 | 138837 | Enzo Doria | 08/2014 |
4109 | (2^461139-7)/47 | 138815 | Lelio R Paula | 08/2015 |
4110 | (17*10^138812-521)/9 | 138813 | Robert Price | 04/2018 |
4111 | 3*10^138811-11 | 138812 | Robert Price | 07/2018 |
4112 | 29109^31088-31088^29109 | 138778 | Frank Doornink | 05/2024 |
4113 | (28*10^138768+173)/3 | 138769 | Robert Price | 12/2019 |
4114 | (17*2^460963+1)/124051613 | 138757 | Lelio R Paula | 08/2015 |
4115 | (379*10^138737-1)/9 | 138739 | Robert Price | 02/2020 |
4116 | (43*10^138648+101)/9 | 138649 | Robert Price | 11/2018 |
4117 | 2^460567-113541 | 138645 | Enzo Doria | 08/2014 |
4118 | 2^460539+224789 | 138637 | Enzo Doria | 07/2024 |
4119 | (10^138622+161)/9 | 138622 | Robert Price | 09/2021 |
4120 | 7*10^138604+3 | 138605 | Robert Price | 08/2015 |
4121 | (133*10^138600+17)/3 | 138602 | Robert Price | 11/2021 |
4122 | 33912^12203+12203^33912 | 138581 | Hans Havermann | 05/2021 |
4123 | 2^460330+69 | 138574 | Lelio R Paula | 09/2017 |
4124 | (17*10^138569-77)/3 | 138570 | Robert Price | 08/2019 |
4125 | 31186^27725+27725^31186 | 138556 | Hans Havermann | 05/2021 |
4126 | (16*10^138545+89)/3 | 138546 | Robert Price | 03/2021 |
4127 | 39753^3056+3056^39753 | 138546 | Hans Havermann | 05/2021 |
4128 | 31282^26847+26847^31282 | 138545 | Hans Havermann | 05/2021 |
4129 | 6*10^138520-37 | 138521 | Robert Price | 02/2021 |
4131 | 2^460078-69581 | 138498 | Enzo Doria | 12/2015 |
4130 | 31830^22447+22447^31830 | 138498 | Hans Havermann | 05/2021 |
4132 | 37384^5065+5065^37384 | 138492 | Hans Havermann | 05/2021 |
4133 | 28736^31055-31055^28736 | 138457 | Frank Doornink | 05/2024 |
4134 | 34774^9585+9585^34774 | 138456 | Hans Havermann | 05/2021 |
4135 | 10^138444-5001 | 138444 | Robert Price | 12/2021 |
4136 | 2^459768+1531 | 138404 | Lelio R Paula | 06/2012 |
4137 | (266*10^138328-17)/3 | 138330 | Robert Price | 07/2020 |
4138 | 27200^31193-31193^27200 | 138328 | Frank Doornink | 01/2024 |
4139 | 28782^31019-31019^28782 | 138318 | Frank Doornink | 05/2024 |
4140 | 32963^15696+15696^32963 | 138306 | Hans Havermann | 05/2021 |
4141 | 2^459343-113611 | 138277 | Enzo Doria | 08/2014 |
4142 | (28*10^138240+113)/3 | 138241 | Robert Price | 03/2020 |
4143 | 2^459199+1874393 | 138233 | Enzo Doria | 06/2016 |
4144 | 33339^14002+14002^33339 | 138230 | Hans Havermann | 05/2021 |
4145 | 30137^30860-30860^30137 | 138226 | Frank Doornink | 05/2024 |
4146 | 2^459063-345307 | 138192 | Enzo Doria | 06/2015 |
4147 | 2*10^138162-43 | 138163 | Robert Price | 04/2018 |
4148 | 2^458927-112747 | 138151 | Enzo Doria | 06/2014 |
4149 | 2^458927-69217 | 138151 | Enzo Doria | 11/2015 |
4150 | 30907^29458+29458^30907 | 138130 | Hans Havermann | 05/2021 |
4151 | 32882^15837+15837^32882 | 138094 | Hans Havermann | 05/2021 |
4152 | 39252^3295+3295^39252 | 138083 | Hans Havermann | 05/2021 |
4153 | 33789^12190+12190^33789 | 138062 | Hans Havermann | 06/2021 |
4154 | 555555*2^458524+1513 | 138036 | Darren Bedwell | 08/2009 |
4155 | 28095^31028-31028^28095 | 138033 | Frank Doornink | 05/2024 |
4156 | 30931^29002+29002^30931 | 138028 | Hans Havermann | 05/2021 |
4157 | 2^458465+2^32+1 | 138012 | T. D. Noe | 06/2007 |
4158 | 32206^19275+19275^32206 | 138003 | Hans Havermann | 05/2021 |
4159 | 2^458321-113053 | 137969 | Enzo Doria | 07/2014 |
4160 | 6^177298+323 | 137965 | Riley Fisher | 03/2023 |
4161 | 2^458298+79459 | 137962 | Enzo Doria | 06/2016 |
4162 | 30254^30789-30789^30254 | 137959 | Frank Doornink | 05/2024 |
4163 | 2^458248-21815 | 137947 | Enzo Doria | 07/2013 |
4164 | 2^458194+1876549 | 137931 | Enzo Doria | 07/2016 |
4165 | (318259#+325270)/(2^2*5*11*2957) | 137907 | Makoto Morimoto | 10/2017 |
4166 | (318259#+2625)/(3^2*5*7^5*22965193) | 137899 | Makoto Morimoto | 06/2019 |
4167 | (793*10^137887+53)/9 | 137889 | Robert Price | 01/2022 |
4168 | 2^457937+57 | 137853 | Lelio R Paula | 09/2017 |
4169 | 28714^30921-30921^28714 | 137849 | Frank Doornink | 05/2024 |
4170 | (8*10^137845+13)/3 | 137846 | Robert Price | 06/2018 |
4171 | 2^457822+105 | 137819 | Donovan Johnson | 06/2006 |
4172 | 2^457754-113711 | 137798 | Enzo Doria | 09/2014 |
4173 | 11^132315-360 | 137792 | Enzo Doria | 09/2012 |
4174 | 32072^19689+19689^32072 | 137725 | Hans Havermann | 06/2021 |
4175 | 26529^31132-31132^26529 | 137720 | Frank Doornink | 03/2024 |
4176 | 44592^1225+1225^44592 | 137707 | Hans Havermann | 05/2021 |
4177 | 28986^30857-30857^28986 | 137690 | Frank Doornink | 05/2024 |
4178 | 2^457347-37 | 137676 | Lelio R Paula | 09/2017 |
4179 | 2^457322-2786393 | 137668 | Enzo Doria | 10/2015 |
4180 | gcd(Phi(699340,10),(10^34967+1)^3*(10^34967+1+10^17484)-(10^69934+10^34967)*(10^17484-1)+10^104901) | 137664 | Serge Batalov | 04/2015 |
4181 | 34015^11134+11134^34015 | 137647 | Hans Havermann | 06/2021 |
4182 | 2^457240-59939 | 137643 | Enzo Doria | 10/2015 |
4183 | (856*10^137633-1)/9 | 137635 | Robert Price | 03/2020 |
4184 | 36232^6289+6289^36232 | 137631 | Hans Havermann | 05/2021 |
4185 | 2^457120-21575 | 137607 | Enzo Doria | 07/2013 |
4186 | (11*2^456978+1)/15 | 137564 | Lelio R Paula | 07/2015 |
4187 | 30963^27722+27722^30963 | 137564 | Hans Havermann | 04/2021 |
4188 | 33722^12003+12003^33722 | 137562 | Hans Havermann | 06/2021 |
4189 | (7*25^98399+10613)/12 | 137556 | Curtis Bright | 05/2015 |
4190 | 41901^1918+1918^41901 | 137555 | Hans Havermann | 06/2021 |
4191 | (7*10^137551-1)/3 | 137552 | Robert Price | 08/2022 |
4192 | 32930^15021+15021^32930 | 137539 | Hans Havermann | 05/2021 |
4193 | 31178^25785+25785^31178 | 137538 | Hans Havermann | 05/2021 |
4194 | 419^52446+52446^419 | 137525 | Norbert Schneider | 11/2020 |
4195 | 2^456813+214175 | 137515 | Enzo Doria | 10/2023 |
4196 | 2^456796-113513 | 137510 | Enzo Doria | 08/2014 |
4197 | 31788^21137+21137^31788 | 137485 | Hans Havermann | 04/2021 |
4198 | (7*2^456655+1)/39 | 137467 | Lelio R Paula | 07/2015 |
4199 | 27151^31004-31004^27151 | 137466 | Frank Doornink | 01/2024 |
4200 | 2^456503-114361 | 137422 | Enzo Doria | 01/2015 |
4201 | (11*2^456387+1)/19 | 137386 | Lelio R Paula | 07/2015 |
4202 | 30618^30618-5^5 | 137352 | Serge Batalov | 04/2024 |
4203 | 36248^6147+6147^36248 | 137332 | Hans Havermann | 05/2021 |
4204 | 31986^19651+19651^31986 | 137329 | Hans Havermann | 05/2021 |
4205 | 2^456167+22313 | 137320 | Enzo Doria | 09/2023 |
4206 | 31817^20656+20656^31817 | 137292 | Hans Havermann | 05/2021 |
4207 | (71*10^137250+1)/9 | 137251 | Serge Batalov | 05/2010 |
4208 | 2^455922+76249 | 137247 | Enzo Doria | 05/2016 |
4209 | 31310^24171+24171^31310 | 137241 | Hans Havermann | 05/2021 |
4210 | 14^119741-119741^14 | 137239 | Serge Batalov | 04/2016 |
4211 | 35014^8297+8297^35014 | 137218 | Hans Havermann | 05/2021 |
4212 | (19*2^455760+1)/3455 | 137196 | Lelio R Paula | 07/2015 |
4214 | 124^(2^16)+57^(2^16) | 137195 | Valeryi Kuryshev | 02/2011 |
4213 | 124^65536+57^65536 | 137195 | Serge Batalov | 03/2018 |
4215 | 2^455689+72677 | 137177 | Enzo Doria | 04/2016 |
4216 | (17948!)^2+Prime(17948) | 137118 | Robert Price | 08/2014 |
4217 | 31287^24128+24128^31287 | 137116 | Hans Havermann | 05/2021 |
4218 | (37^87421-1)/36 | 137093 | Robert Price | 03/2012 |
4219 | 36233^6070+6070^36233 | 137077 | Hans Havermann | 05/2021 |
4220 | (8*10^137073-17)/9 | 137073 | Serge Batalov | 11/2022 |
4221 | 38418^3697+3697^38418 | 137070 | Hans Havermann | 04/2021 |
4222 | 2^455323-57 | 137066 | Lelio R Paula | 09/2017 |
4223 | (56*10^137019+583)/9 | 137020 | Robert Price | 08/2021 |
4224 | 25017^31148-31148^25017 | 136997 | Frank Doornink | 12/2023 |
4225 | (73*17^111333-9)/16 | 136991 | Curtis Bright | 05/2015 |
4226 | 2^455025-112723 | 136977 | Enzo Doria | 06/2014 |
4227 | 33876^11039+11039^33876 | 136959 | Hans Havermann | 05/2021 |
4228 | (19860^32041-1)/(19860^179-1) | 136943 | Ryan Propper | 11/2023 |
4229 | (251^57059-1)/250 | 136921 | Anonymous | 04/2024 |
4230 | 35142^7873+7873^35142 | 136919 | Hans Havermann | 05/2021 |
4231 | (4997*31^91805-1)/2 | 136918 | Eric Chen | 05/2024 |
4232 | 66*10^136894+7 | 136896 | Robert Price | 07/2020 |
4233 | 28766^30697-30697^28766 | 136875 | Frank Doornink | 05/2024 |
4234 | 2^454675-1777 | 136871 | Yves Minet | 10/2011 |
4235 | 31676^20931+20931^31676 | 136866 | Hans Havermann | 05/2021 |
4236 | 3*10^136829+29 | 136830 | Robert Price | 05/2018 |
4237 | 4*10^136813-57 | 136814 | Robert Price | 10/2018 |
4238 | (6092*28^94536-143)/9 | 136812 | Curtis Bright | 05/2015 |
4239 | fibonacci(654572)-2 | 136798 | Jon Grantham | 08/2023 |
4240 | 37359^4588+4588^37359 | 136795 | Hans Havermann | 05/2021 |
4241 | 2^454348-53 | 136773 | Lelio R Paula | 09/2017 |
4242 | 31^91680-2 | 136729 | Lelio R Paula | 05/2017 |
4243 | 2^454199-113697 | 136728 | Enzo Doria | 09/2014 |
4244 | 30785^27622+27622^30785 | 136725 | Hans Havermann | 05/2021 |
4245 | 32973^14014+14014^32973 | 136725 | Hans Havermann | 05/2021 |
4247 | 7*10^136716+69 | 136717 | Robert Price | 07/2019 |
4246 | 36002^6273+6273^36002 | 136717 | Hans Havermann | 05/2021 |
4248 | 6*10^136692+53 | 136693 | Robert Price | 05/2020 |
4249 | (13*10^136687+47)/3 | 136688 | Robert Price | 10/2018 |
4250 | 2^453935-2791357 | 136649 | Enzo Doria | 01/2016 |