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 ? |
1001 | 2^1078242+1881649 | 324584 | Enzo Doria | 11/2016 |
1002 | 2^1077737+1880117 | 324432 | Enzo Doria | 10/2016 |
1003 | 3^679017-5*2^679017 | 323974 | Jon Grantham | 08/2023 |
1004 | 2^1076006+29539 | 323911 | Enzo Doria | 03/2024 |
1005 | 2^1075573+32417 | 323780 | Enzo Doria | 05/2024 |
1006 | 2^1075425+1880117 | 323736 | Enzo Doria | 10/2016 |
1007 | (28^223381+1)/29 | 323267 | Paul Bourdelais | 12/2020 |
1008 | 10^322999+187071 | 323000 | Stefano Morozzi | 03/2019 |
1009 | 10^322999-143151 | 322999 | Patrick De Geest | 05/2020 |
1010 | 2^1072744+32641 | 322929 | Enzo Doria | 05/2024 |
1011 | 2^1072146+1886869 | 322749 | Enzo Doria | 04/2017 |
1012 | 2^1072118-7321953 | 322740 | Enzo Doria | 02/2015 |
1013 | 2025^97561-2024^97561 | 322579 | Henri Lifchitz | 01/2025 |
1014 | 2^1071026+1886869 | 322411 | Enzo Doria | 04/2017 |
1015 | 2^1070539+1880633 | 322265 | Enzo Doria | 10/2016 |
1016 | 2^1069788+26587 | 322039 | Enzo Doria | 12/2023 |
1017 | 2^1069293-1147195 | 321890 | Enzo Doria | 05/2015 |
1018 | 2^1065968+1880941 | 320889 | Enzo Doria | 10/2016 |
1019 | 2^1065897-1147195 | 320867 | Enzo Doria | 05/2015 |
1020 | 2^1063427+1882103 | 320124 | Enzo Doria | 12/2016 |
1021 | 2^1061095-1061095 | 319422 | Henri Lifchitz | 10/2013 |
1022 | 2^1060950+653119 | 319378 | Enzo Doria | 12/2016 |
1023 | 2^1060363+782753 | 319202 | Enzo Doria | 11/2016 |
1024 | 2^1060028+31771 | 319101 | Enzo Doria | 04/2024 |
1025 | (71^172259-1)/70 | 318895 | Paul Bourdelais | 08/2020 |
1026 | 2^1058425+38507 | 318618 | Enzo Doria | 11/2024 |
1027 | -30*Bern(85996)/236037521 | 318354 | Sergey Batalov | 10/2023 |
1028 | 2^1055665+30407 | 317787 | Enzo Doria | 03/2024 |
1029 | 2^1054736+483061 | 317508 | Enzo Doria | 12/2016 |
1030 | 2^1053965+1879667 | 317276 | Enzo Doria | 10/2016 |
1031 | (43^194119-1)/42 | 317086 | Paul Bourdelais | 08/2020 |
1032 | 2^1052899+225413 | 316955 | Enzo Doria | 08/2024 |
1033 | 2^1052186-458165 | 316740 | Enzo Doria | 03/2015 |
1034 | 11^303909+2 | 316489 | Paul Bourdelais | 08/2023 |
1035 | 2^1049026+214609 | 315789 | Enzo Doria | 11/2023 |
1036 | 2^1048576+69661 | 315653 | Boyan Hu | 08/2024 |
1037 | 2^1046613-114685 | 315062 | Enzo Doria | 04/2015 |
1038 | 2^1045625-459373 | 314765 | Enzo Doria | 06/2015 |
1039 | 10^(2*157363+1)-8*10^157363-1 | 314727 | Robert Price | 07/2023 |
1040 | (7*10^314564-61)/9 | 314564 | Erik Branger | 09/2016 |
1041 | 2^1044771+228023 | 314508 | Enzo Doria | 11/2024 |
1042 | 2^1044206+7 | 314338 | Stefano Morozzi | 10/2022 |
1043 | (7^371669-1)/6 | 314096 | Paul Bourdelais | 02/2010 |
1044 | (53^181981-1)/52 | 313784 | Paul Bourdelais | 08/2020 |
1045 | (8^347437-5^347437)/3 | 313767 | Jon Grantham | 08/2023 |
1046 | (10^313741+1)/11/11294677 | 313733 | Alfred Reich | 04/2024 |
1047 | 2^1041944+283051 | 313657 | Enzo Doria | 12/2016 |
1048 | (1624^97969-1)/(1624^313-1) | 313533 | Sergey Batalov | 11/2023 |
1049 | 2^1041153-114391 | 313419 | Enzo Doria | 02/2015 |
1050 | (2^1039700+9)/5 | 312981 | Stefano Morozzi | 09/2022 |
1051 | (74^167311+1)/75 | 312742 | Paul Bourdelais | 12/2020 |
1052 | 2^1038871+1866983 | 312732 | Enzo Doria | 04/2016 |
1053 | 2^1038545+71657 | 312634 | Enzo Doria | 08/2023 |
1054 | (55^179573-1)/54 | 312521 | Paul Bourdelais | 08/2020 |
1055 | 2^1037647+1881263 | 312363 | Enzo Doria | 11/2016 |
1056 | 2^1037226+1879699 | 312237 | Enzo Doria | 10/2016 |
1057 | 2^1036867+1865843 | 312129 | Enzo Doria | 02/2016 |
1058 | (76^165947+1)/77 | 312114 | Paul Bourdelais | 01/2021 |
1059 | 2^1036324+39091 | 311965 | Enzo Doria | 11/2024 |
1060 | 2^1036020-114539 | 311874 | Enzo Doria | 02/2015 |
1061 | (90^159463-1)/89 | 311628 | Paul Bourdelais | 08/2020 |
1062 | 2^1034546+28819 | 311430 | Enzo Doria | 02/2024 |
1063 | 2^1032240+1883431 | 310736 | Enzo Doria | 01/2017 |
1064 | 64211^64588+64588^64211 | 310514 | Norbert Schneider | 11/2023 |
1065 | 2^1031450+29629 | 310498 | Enzo Doria | 03/2024 |
1066 | 2^1030352+1870021 | 310167 | Enzo Doria | 06/2016 |
1067 | 2^1030046+1882843 | 310075 | Enzo Doria | 11/2016 |
1068 | 2^1029120+227971 | 309796 | Enzo Doria | 11/2024 |
1069 | 3^648872+16 | 309591 | Robert Price | 04/2020 |
1070 | (16976^73441-1)/(16976^271-1) | 309498 | Ryan Propper | 11/2023 |
1071 | 64221^64366+64366^64221 | 309451 | Norbert Schneider | 06/2023 |
1072 | (11121^76729-1)/(11121^277-1) | 309336 | Ryan Propper | 11/2023 |
1073 | 2^1027478+219259 | 309302 | Enzo Doria | 02/2024 |
1074 | 2^1026999+20513 | 309158 | Enzo Doria | 07/2023 |
1075 | 5^442281+2 | 309142 | Paul Bourdelais | 01/2021 |
1076 | 2^1026204+22741 | 308919 | Enzo Doria | 09/2023 |
1077 | 2^1026190+15 | 308914 | Stefano Morozzi | 10/2022 |
1078 | 2^1025108+20851 | 308589 | Enzo Doria | 08/2023 |
1079 | A352736(16) | 306985 | Kellen Shenton | 05/2022 |
1080 | 2^1019777+213947 | 306984 | Enzo Doria | 10/2023 |
1081 | (11^293831-1)/10 | 305993 | Paul Bourdelais | 03/2010 |
1082 | (67^167449-1)/66 | 305773 | Paul Bourdelais | 08/2020 |
1083 | (62^170539+1)/63 | 305671 | Paul Bourdelais | 12/2020 |
1084 | 2^1015321-1015321 | 305643 | Henri Lifchitz | 08/2013 |
1085 | 2^1014775+27113 | 305478 | Enzo Doria | 12/2023 |
1086 | 2^1014450+7 | 305380 | Stefano Morozzi | 10/2022 |
1087 | 2^1014336+215731 | 305346 | Enzo Doria | 12/2023 |
1088 | 2^1014224-2791229 | 305312 | Enzo Doria | 01/2016 |
1089 | (10^304986+7)/673 | 304984 | Alfred Reich | 11/2021 |
1090 | 65473^45250+45250^65473 | 304818 | Hans Havermann | 02/2022 |
1091 | 66012^41423+41423^66012 | 304794 | Hans Havermann | 03/2022 |
1092 | 65073^48202+48202^65073 | 304742 | Hans Havermann | 04/2022 |
1093 | 2^1012054+31669 | 304659 | Enzo Doria | 06/2024 |
1094 | 238176^19+19^238176 | 304569 | Hans Havermann | 03/2022 |
1095 | 73122^14615+14615^73122 | 304539 | Hans Havermann | 05/2022 |
1096 | 64492^52639+52639^64492 | 304487 | Hans Havermann | 03/2022 |
1097 | 65955^41288+41288^65955 | 304437 | Hans Havermann | 04/2022 |
1098 | 71729^17530+17530^71729 | 304403 | Hans Havermann | 03/2022 |
1099 | 70170^21733+21733^70170 | 304336 | Hans Havermann | 03/2022 |
1100 | 2^1010751-107709 | 304267 | Enzo Doria | 03/2014 |
1101 | 84473^3994+3994^84473 | 304222 | Hans Havermann | 03/2022 |
1102 | (2^1010623-1)/12602017578957977 | 304212 | Tony Prest / Never Odd Or Even | 02/2014 |
1103 | 74442^12125+12125^74442 | 303998 | Hans Havermann | 02/2022 |
1104 | 77842^8039+8039^77842 | 303989 | Hans Havermann | 01/2022 |
1105 | 64209^54140+54140^64209 | 303935 | Hans Havermann | 02/2022 |
1106 | 2^1009577+1869587 | 303913 | Enzo Doria | 06/2016 |
1107 | 67389^32338+32338^67389 | 303906 | Hans Havermann | 02/2022 |
1108 | 8^336419-7^336419 | 303817 | Jean-Louis Charton | 01/2008 |
1109 | 2^1009168+15 | 303790 | Stefano Morozzi | 10/2022 |
1110 | 80766^5771+5771^80766 | 303782 | Hans Havermann | 01/2022 |
1111 | 66094^39385+39385^66094 | 303724 | Hans Havermann | 01/2022 |
1112 | 69147^24574+24574^69147 | 303589 | Hans Havermann | 02/2022 |
1113 | 78390^7459+7459^78390 | 303580 | Hans Havermann | 01/2022 |
1114 | 2^1008301+1869377 | 303529 | Enzo Doria | 06/2016 |
1115 | 65008^46615+46615^65008 | 303492 | Hans Havermann | 02/2022 |
1116 | (2^1007838+5)/3 | 303389 | Serge Batalov | 08/2015 |
1117 | 65018^46293+46293^65018 | 303343 | Hans Havermann | 01/2022 |
1118 | 6^389756+5 | 303290 | Paul Bourdelais | 02/2021 |
1119 | 71016^18649+18649^71016 | 303285 | Hans Havermann | 01/2022 |
1120 | 2^1007065+29231 | 303157 | Enzo Doria | 03/2024 |
1121 | 80160^6047+6047^80160 | 303129 | Hans Havermann | 01/2022 |
1122 | 67434^31237+31237^67434 | 303094 | Hans Havermann | 03/2022 |
1123 | 65537^42102+42102^65537 | 303063 | Hans Havermann | 02/2022 |
1124 | 71790^16553+16553^71790 | 302874 | Hans Havermann | 11/2021 |
1125 | 65208^44129+44129^65208 | 302874 | Hans Havermann | 11/2021 |
1126 | 84181^3960+3960^84181 | 302858 | Hans Havermann | 11/2021 |
1127 | (13703^73441-1)/(13703^271-1) | 302691 | Ryan Propper | 11/2023 |
1128 | 71956^16087+16087^71956 | 302682 | Hans Havermann | 11/2021 |
1129 | 2^1005326+383059 | 302634 | Enzo Doria | 12/2016 |
1130 | 2^1004929+1877567 | 302514 | Enzo Doria | 08/2016 |
1131 | 69341^22978+22978^69341 | 302418 | Hans Havermann | 12/2021 |
1132 | 111443^516+516^111443 | 302306 | Hans Havermann | 12/2021 |
1133 | 67638^29387+29387^67638 | 302218 | Hans Havermann | 11/2021 |
1134 | 2^1003494+1874899 | 302082 | Enzo Doria | 06/2016 |
1135 | 75189^10400+10400^75189 | 302037 | Hans Havermann | 12/2021 |
1136 | 67237^31042+31042^67237 | 302026 | Hans Havermann | 12/2021 |
1137 | 64540^47791+47791^64540 | 302005 | Hans Havermann | 11/2021 |
1138 | 2^1003046+60529 | 301947 | Enzo Doria | 04/2016 |
1139 | 83278^4209+4209^83278 | 301815 | Hans Havermann | 09/2021 |
1140 | 64431^48250+48250^64431 | 301763 | Hans Havermann | 09/2021 |
1141 | 67237^30714+30714^67237 | 301716 | Hans Havermann | 09/2021 |
1142 | 64641^46288+46288^64641 | 301581 | Hans Havermann | 09/2021 |
1143 | 71513^16482+16482^71513 | 301572 | Hans Havermann | 10/2021 |
1144 | 72017^15396+15396^72017 | 301565 | Hans Havermann | 09/2021 |
1145 | 65534^39927+39927^65534 | 301540 | Hans Havermann | 10/2021 |
1146 | (23^221411-1)/22 | 301501 | Paul Bourdelais | 08/2020 |
1147 | 63169^59152+59152^63169 | 301441 | Hans Havermann | 09/2021 |
1148 | 75055^10348+10348^75055 | 301336 | Hans Havermann | 09/2021 |
1149 | 2^1000647+1881353 | 301225 | Enzo Doria | 11/2016 |
1150 | 83686^3961+3961^83686 | 301086 | Hans Havermann | 10/2021 |
1151 | 68529^24742+24742^68529 | 301078 | Hans Havermann | 09/2021 |
1152 | 65207^41416+41416^65207 | 301072 | Hans Havermann | 10/2021 |
1154 | 2^1000000+821751 | 301030 | Tony Prest / Never Odd Or Even | 10/2015 |
1153 | 2^999999+77151 | 301030 | Norman Luhn | 09/2023 |
1155 | 90762^2071+2071^90762 | 300984 | Hans Havermann | 06/2021 |
1156 | 63909^51142+51142^63909 | 300934 | Hans Havermann | 08/2021 |
1157 | 2^999646+1874029 | 300924 | Enzo Doria | 06/2016 |
1158 | 66280^34607+34607^66280 | 300856 | Hans Havermann | 06/2021 |
1159 | 65534^38925+38925^65534 | 300817 | Hans Havermann | 07/2021 |
1160 | 63296^56517+56517^63296 | 300794 | Hans Havermann | 06/2021 |
1161 | 110610^523+523^110610 | 300694 | Hans Havermann | 06/2021 |
1162 | 66428^33609+33609^66428 | 300684 | Hans Havermann | 06/2021 |
1163 | 74247^11210+11210^74247 | 300672 | Hans Havermann | 06/2021 |
1164 | (59^169777-1)/58 | 300649 | Paul Bourdelais | 08/2020 |
1165 | 10^300476+3 | 300477 | Ed Trice | 10/2012 |
1166 | 10^300476-530913 | 300476 | Patrick De Geest | 03/2016 |
1167 | 66703^31960+31960^66703 | 300471 | Hans Havermann | 06/2021 |
1168 | 63722^51915+51915^63722 | 300468 | Hans Havermann | 06/2021 |
1169 | 2^998053+1879667 | 300444 | Enzo Doria | 09/2016 |
1170 | 77018^7959+7959^77018 | 300437 | Hans Havermann | 07/2021 |
1171 | 314738^9+9^314738 | 300337 | Anatoly F. Selevich | 02/2011 |
1172 | 2^997689+217787 | 300335 | Enzo Doria | 01/2024 |
1173 | 69478^20987+20987^69478 | 300281 | Hans Havermann | 07/2021 |
1174 | 64088^48393+48393^64088 | 300239 | Hans Havermann | 07/2021 |
1175 | 64605^44146+44146^64605 | 300084 | Hans Havermann | 08/2021 |
1176 | 2^996845+29027 | 300081 | Enzo Doria | 02/2024 |
1177 | 7^355039-6^355039 | 300043 | Jean-Louis Charton | 05/2011 |
1178 | 67594^27465+27465^67594 | 300035 | Hans Havermann | 06/2021 |
1179 | 10^300000+287389 | 300001 | Patrick De Geest | 10/2019 |
1180 | 10^300000-83657 | 300000 | Patrick De Geest | 10/2019 |
1181 | 70599^17756+17756^70599 | 300000 | Hans Havermann | 06/2021 |
1182 | numbpart(72526161452) | 299999 | Serge Batalov | 04/2017 |
1183 | 2^996182-114431 | 299881 | Enzo Doria | 02/2015 |
1184 | 3*2^996126+5 | 299865 | Jon Grantham | 07/2023 |
1185 | 2^996034-17 | 299837 | Stefano Morozzi | 07/2022 |
1186 | 2^995793+36587 | 299764 | Enzo Doria | 09/2024 |
1187 | (19*10^299640+77)/3 | 299641 | Robert Price | 03/2023 |
1188 | 2^995214-2788361 | 299590 | Enzo Doria | 12/2015 |
1189 | 2^994791-114319 | 299462 | Enzo Doria | 01/2015 |
1190 | 2^994490-1863791 | 299372 | Enzo Doria | 01/2016 |
1191 | 2^993322+1885729 | 299020 | Enzo Doria | 03/2017 |
1192 | 2^993227+230033 | 298992 | Enzo Doria | 12/2024 |
1193 | (36395^65536+36393^65536)/2 | 298913 | Kellen Shenton | 04/2022 |
1194 | 2^992711-2788807 | 298836 | Enzo Doria | 12/2015 |
1195 | 2^992525-114199 | 298780 | Enzo Doria | 12/2014 |
1196 | (7^353501-3^353501)/4 | 298743 | Jon Grantham | 08/2023 |
1197 | 2^992329+1884707 | 298721 | Enzo Doria | 02/2017 |
1198 | 2^992292+229801 | 298710 | Enzo Doria | 12/2024 |
1199 | 2^992052+215491 | 298638 | Enzo Doria | 11/2023 |
1200 | 2^991968-23 | 298613 | Stefano Morozzi | 07/2022 |
1201 | 2^991715-19 | 298536 | Stefano Morozzi | 07/2022 |
1202 | (10^298414+7)/191/823/56921/1334467 | 298398 | Alfred Reich | 10/2021 |
1203 | 2^989562+25 | 297888 | Stefano Morozzi | 05/2021 |
1204 | 2^988580+214051 | 297593 | Enzo Doria | 10/2023 |
1205 | 2^988537+218837 | 297580 | Enzo Doria | 03/2024 |
1206 | (19*10^297497+77)/3 | 297498 | Robert Price | 03/2023 |
1207 | (2*10^297488-23)/3 | 297488 | Robert Price | 10/2022 |
1208 | (2^986191+1)/3 | 296873 | Vincent Diepeveen | 06/2008 |
1209 | 2^985217-114553 | 296580 | Enzo Doria | 03/2015 |
1210 | (76^157649-1)/75 | 296507 | Paul Bourdelais | 07/2019 |
1211 | 2^984650+21529 | 296410 | Enzo Doria | 08/2023 |
1212 | 2^984131-1828009 | 296253 | Enzo Doria | 01/2015 |
1213 | 2^983620+60451 | 296100 | Phil Moore | 03/2008 |
1214 | 2^982721-2683 | 295829 | Yves Minet | 02/2016 |
1215 | (23*10^295581+7)/3 | 295582 | Robert Price | 05/2023 |
1216 | 2^981298-2788421 | 295401 | Enzo Doria | 12/2015 |
1217 | 2^981163-2790967 | 295360 | Enzo Doria | 12/2015 |
1218 | 2^981016-15 | 295316 | Stefano Morozzi | 07/2022 |
1219 | 8*10^295160-13 | 295161 | Robert Price | 08/2023 |
1220 | 2^979594+1865839 | 294888 | Enzo Doria | 02/2016 |
1221 | 2^979502+221029 | 294860 | Enzo Doria | 03/2024 |
1222 | 2*10^294527-91 | 294528 | Robert Price | 02/2023 |
1223 | (49363^63001-1)/(49363^251-1) | 294511 | Ryan Propper | 11/2023 |
1224 | 10^294475+49 | 294476 | Robert Price | 02/2023 |
1225 | (11*10^294308+91)/3 | 294309 | Robert Price | 03/2023 |
1226 | 2^976760+1885021 | 294035 | Enzo Doria | 02/2017 |
1227 | 3*2^976518+5 | 293962 | Jon Grantham | 07/2023 |
1228 | 2^975798+218599 | 293745 | Enzo Doria | 01/2024 |
1229 | 2^974441+1878407 | 293336 | Enzo Doria | 08/2016 |
1230 | 2^974180+1876831 | 293258 | Enzo Doria | 07/2016 |
1231 | 2^974170+453319 | 293255 | Enzo Doria | 01/2017 |
1232 | (211^126023-1)/210 | 292911 | Anonymous | 05/2024 |
1233 | 2^972744-114419 | 292826 | Enzo Doria | 03/2015 |
1234 | 11^281143+6 | 292781 | Paul Bourdelais | 03/2021 |
1235 | (4*10^292619-91)/3 | 292620 | Robert Price | 12/2022 |
1236 | E(69468)/13247122135 | 292549 | Sergey Batalov | 10/2023 |
1237 | CopelandErdos(292447) | 292447 | Mark Rodenkirch | 12/2015 |
1238 | 3*10^292344-97 | 292345 | Robert Price | 01/2023 |
1239 | 2^970911+1873373 | 292274 | Enzo Doria | 07/2016 |
1240 | 2^970670+383059 | 292201 | Enzo Doria | 12/2016 |
1241 | 2^970141-100363 | 292042 | Enzo Doria | 02/2014 |
1242 | 2^969945+1874717 | 291983 | Enzo Doria | 06/2016 |
1243 | 2^969384+1880701 | 291814 | Enzo Doria | 10/2016 |
1244 | (13*10^291721-43)/3 | 291722 | Robert Price | 08/2023 |
1245 | (3^611333-2^611333)/(99035947*87109884549431) | 291659 | Mike Oakes | 02/2017 |
1246 | 3*2^963892+5 | 290161 | Jon Grantham | 07/2023 |
1247 | (151*10^289877-1)/3 | 289879 | Robert Price | 07/2023 |
1248 | 2^962194+60139 | 289650 | Enzo Doria | 02/2016 |
1249 | 2^959307-1861507 | 288781 | Enzo Doria | 11/2015 |
1250 | (17*10^288692+31)/3 | 288693 | Robert Price | 04/2023 |