Factorizations of repunit numbers of the form (10n-1)/9 (111111...)


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-  Last update: Jan 09, 2026    

- Found by Kurt Beschorner 
   Jan 09, 2026  n = 1870: 5128668766272866468095639305104398433189744851;          ecm: B1 =30e6; sigma: 6613595492840788
   Jan 09, 2026  n = 6059: 604754479626970633385807908885721925751;                 ecm: B1 = 1e6; sigma: 3737768319609425
   Jan 09, 2026  n =10062: 24789562461695963248181535390536428093;                  ecm: B1 = 3e6; sigma: 7961458325696619
   Jan 09, 2026  n =10092: 118467369849811516102081067316529174789;                 ecm: B1 = 3e6; sigma: 8486153667115848
   Jan 09, 2026  n=10100M: 283150057168781592245569347545404764475501;              ecm: B1 = ne6; sigma: 7378141976898627

				  
-  Bo Chen, Wenjie Fang, Alfred Eichhorn, Danilo Nitsche, Oliver Kruse, Kurt Beschorner 
   Jan 07, 2026  n =2100L: 193751542953818383623751007971508697187648569310897340384149680038864694209730259117193071430058513601; SNFS      	 
 
				  
- Found by John            
   Jan 02, 2026  n = 7283: 314692671239067813832517110680262983757;                 ecm: B1 = 3e6; sigma: 73395840219749
   Jan 02, 2026  n = 7477: 1074073393308214830438311650689898276747;                ecm: B1 = 3e6; sigma: 8542930431401004
   Jan 02, 2026  n =14659: 29247967807756474051929772534601;                        ecm: B1 = 1e6; sigma: 866437075847994
   

- Found by Kurt Beschorner 
   Dec 31, 2025  n =10019: 92737573618781078807405607396441881;                     ecm: B1 = 1e6; sigma: 285315050378714
   Dec 31, 2025  n =10026: 9180588964796985741580659514205863;                      ecm: B1 = 2e6; sigma: 3725749690948259
   Dec 31, 2025  n =10052: 2542173255124202292496079056095920629;                   ecm: B1 = 2e6; sigma: 1191876174981516 
   Dec 31, 2025  n =10077: 79959108219645603435640821367094959;                     ecm: B1 = 1e6; sigma: 3980675226921496 
   
				  
-  Bo Chen, Wenjie Fang, Alfred Eichhorn, Danilo Nitsche, Kurt Beschorner 
   Dec 31, 2025   R2100L/c215: SNFS-difficulty = 280;
                  1652M unique raw relations and 1379M unique ideals are collected;
                  msieve-excerpts: linear algebra, msieve -nc2
                  - matrix is 79676380 x 79676605 (38945.6 MB) with weight 9932584887 (124.66/col)
                  - sparse part has weight 9412581624 (118.13/col)
                  - using block size 8192 and superblock size 2433024 for processor cache size 25344 kB
                  - commencing Lanczos iteration (18 threads)
                  - linear algebra completed 65.580M of 70412842 dimensions (93.0%, ETA 131h)  


-  Bo Chen, Wenjie Fang, Alfred Eichhorn, Danilo Nitsche, Kurt Beschorner 
   Dec 24, 2025   R477/c252: SNFS-difficulty = 318;
                  1450M unique raw relations and 1846M unique ideals are collected;
                  target: 2850M unique raw relations;  
                  currently progress 51%;    
				  

- Found by Alfred Eichhorn 
   Dec 20, 2025  n =31139: 2387837373197611980511935067;                            ecm: B1 = 1e6; sigma: 2087173534598650
   Dec 20, 2025  n =53327: 43305952419150858153516746452321;                        ecm: B1 = 1e6; sigma: 8330653939167202
   Dec 20, 2025  n =53549: 1323393649967475118367966597;                            ecm: B1 = 1e6; sigma: 5141962449211020 

 
- Found by Kurt Beschorner 
   Dec 18, 2025  n =10085: 672122917247953182262566754321;                          ecm: B1 = 1e6; sigma: 5195366855128972
   Dec 18, 2025  n =10087: 1806529119146425581950105026208477;                      ecm: B1 = 1e6; sigma: 6198181643662328 


- Found by Alfred Eichhorn 
   Dec 02, 2025  n =53089: 4298434139924946907019249107;                            ecm: B1 = 1e6; sigma: 0:1610881837867369  
   Dec 02, 2025  n =53089: 9701962958397346539284956002032129;                      ecm: B1 = 1e6; sigma: 0:6788613116981913 
   Dec 02, 2025  n =53239: 2585542412232443163815461235867;                         ecm: B1 = 1e6; sigma: 0:8715022549635066 

 
- Found by YOYO@home/crashtech
   Dec 01, 2025  n = 1278: 125151895006429085711708327282074420309527054471957157;  ecm: B1 =85e7; sigma: 0:3546992259728554838 
   
   
- Found by John            
   Dec 01, 2025  n = 8447: 23532249505104970201509426459824320081;                  ecm: B1 = 1e6; sigma: 1489816204225402

 
- Found by Torbjörn Granlund 
   Dec 01, 2025  n = 1436: 363556621589222682036523174798067806520954921;           ecm: B1/2 = 2e7/1e11; sigma: 3:3120587397
   Dec 01, 2025  n = 1505: 59696333710576856484355571580317055432224667184271;      ecm: B1/2 = 2e7/1e11; sigma: 1:2591311327
   Dec 01, 2025  n = 1546: 52864362334641411935291082383909636401075020059;         ecm: B1/2 = 2e7/1e11; sigma: 3:970378309
   Dec 01, 2025  n = 1606: 2648351821119735202248358515291199401754096412030093;    ecm: B1/2 = 2e7/1e11; sigma: 3:3318120607
   Dec 01, 2025  n = 1814: 177132509217952548218526203573532338447081013931;        ecm: B1/2 = 2e7/1e11; sigma: 3:1359964141
   Dec 01, 2025  n = 1824: 3801638373231591125328890242459992513986796834906913;    ecm: B1/2 = 5e7/2.5e11; sigma: 0:14490582329689032653
   Dec 01, 2025  n = 1950: 455488632818255423618294643103015306628392801;           ecm: B1/2 = 5e7/2.5e11; sigma: 0:13897628741783896021
   Dec 01, 2025  n = 1970: 340717156290927238874897950415936194037905310281;        ecm: B1/2 = 2e7/1e11; sigma: 3:1390619855
   Dec 01, 2025  n = 2068: 61030896616899812428014738369527937252015709;            ecm: B1   = 1e7;      sigma: 3:1826721549
   Dec 01, 2025  n = 2286: 1275706345585682495860974677957417301632975317;          ecm: B1/2 = 2e7/1e11; sigma: 3:1902478723
   Dec 01, 2025  n = 2286: 6050065574059952053911010514968516325407;                ecm: B1/2 = 2e7/1e11; sigma: 3:442672681
   Dec 01, 2025  n = 2366: 10171409110647536944971724879275746626826059;            ecm: B1/2 = 2e7/1e11; sigma: 0:12293658917608847221
   Dec 01, 2025  n = 2366: 24939208741955313474062821532308504575765583;            ecm: B1/2 = 1e7/3e10; sigma: 3:1266377239
   Dec 01, 2025  n = 2442: 11779596332113635849006583417391309791185331;            ecm: B1/2 = 5e7/5e11; sigma: 0:4277189439997616089
   Dec 01, 2025  n = 2496: 3962708062216757662620112645732950183198721;             ecm: B1/2 = 2e7/1e11; sigma: 3:814233927
   Dec 01, 2025  n = 2530: 152169687122709938350970523324087192873643465841;        ecm: B1/2 = 2e7/1e11; sigma: 3:3504149707
   Dec 01, 2025  n = 2532: 4926504849783160385828965384509070184629;                ecm: B1/2 = 1e7/3e10; sigma: 3:3161808291
   Dec 01, 2025  n = 2646: 509706939243334747841186018230927334458185769;           ecm: B1/2 = 2e7/1e11; sigma: 3:3413868619
   Dec 01, 2025  n = 2688: 177410341942266500588111099489432686104193;              ecm: B1/2 = 2e7/1e11; sigma: 3:1587707951
   Dec 01, 2025  n = 2730: 9571725059902453163980650062479195454881;                ecm: B1/2 = 1e7/3e10; sigma: 0:511405893875714357
   Dec 01, 2025  n = 2742: 239946213332311901179438201698533439702859;              ecm: B1/2 = 1e7/3e10; sigma: 0:14446795740463494977
   Dec 01, 2025  n = 2750: 430551800230554472228099004441347667226251;              ecm: B1/2 = 1e7/3e10; sigma: 3:1771725703
   Dec 01, 2025  n = 2772: 22041663556012348835168023976781975424621;               ecm: B1/2 = 2e7/1e11; sigma: 1:990486571
   Dec 01, 2025  n = 2870: 7274574283084886228970156029364248959697728001;          ecm: B1/2 = 2e7/1e11; sigma: 3:2361849973
   Dec 01, 2025  n = 2910: 5991986515543545660832210531460466678073771;             ecm: B1/2 = 2e7/1e11; sigma: 3:1850144767
   Dec 01, 2025  n = 2916: 2125120582151307346907178739237408472215880789341249;    ecm: B1/2 = 2e7/1e11; sigma: 3:1165134241
   Dec 01, 2025  n = 2946: 1126482418160283957238126570523399364971804618077407619; ecm: B1/2 = 2e7/1e11; sigma: 1:2049438175
   Dec 01, 2025  n = 3012: 24043742454497214533516005794826435441;                  ecm: B1/2 = 2e7/1e11; sigma: 1:1301402097
   Dec 01, 2025  n = 3102: 813235885792304330699359436617353496882672673621374561;  ecm: B1/2 = 2e7/1e11; sigma: 3:4171208691
   Dec 01, 2025  n = 3132: 979961180443807529194148590533339013549;                 ecm: B1/2 = 2e7/1e11; sigma: 1:2757503059
   Dec 01, 2025  n = 3144: 91750697330083507769222424655909530623580073;            ecm: B1/2 = 2e7/1e11; sigma: 3:848590919
   Dec 01, 2025  n = 3168: 11303188942308810864548766140232157066273;               ecm: B1/2 = 1e7/3e10; sigma: 1:4010984965
   Dec 01, 2025  n = 3306: 190491794167941136891187306229602429287;                 ecm: B1/2 = 1e7/3e10; sigma: 3:2182769289
   Dec 01, 2025  n = 3306: 4890876696646128566832634957634871346933;                ecm: B1/2 = 2e7/1e11; sigma: 3:1385652261
   Dec 01, 2025  n = 3402: 477846799397991300635384190554261048533903;              ecm: B1/2 = 2e7/1e11; sigma: 3:1693046801
   Dec 01, 2025  n = 3432: 97075064833339427043657948148952503201;                  ecm: B1/2 = 2e7/1e11; sigma: 0:5659068501763579903
   Dec 01, 2025  n = 3460L: 2540757358839600104113202111310925061720141;            ecm: B1/2 = 5e7/2.5e11; sigma: 0:13109663403317889847
   Dec 01, 2025  n = 3630: 5233687953269526441837874364121264865646881;             ecm: B1/2 = 1e7/3e10; sigma: 3:618789077
   Dec 01, 2025  n = 3690: 2938305108314208459772797341126813803026671822011;       ecm: B1/2 = 2e7/1e11; sigma: 1:4101871257
   Dec 01, 2025  n = 3690: 3423978637273985273437160964946244292811;                ecm: B1/2 = 2e7/1e11; sigma: 3:598883997
   Dec 01, 2025  n = 4060L: 116920298925375519989324489550221526469106921;          ecm: B1/2 = 2e7/1e11; sigma: 3:1514819749
   Dec 01, 2025  n = 4100M: 495010369463614668852274515172200877683101;             ecm: B1/2 = 2e7/1e11; sigma: 3:3850600825
   Dec 01, 2025  n = 4300L: 57937373461141945151624870795609144152805060101;        ecm: B1/2 = 2e7/1e11; sigma: 3:263378935
   Dec 01, 2025  n = 4300M: 1656701265340108969295929008270535125301;               ecm: B1/2 = 1e7/3e10; sigma: 0:13317594721130732133
   Dec 01, 2025  n = 4410: 1561992592027134620872575842443878119761;                ecm: B1/2 = 2e7/1e11; sigma: 3:3730999709
   Dec 01, 2025  n = 4460M: 405953169536941192709764791177483633881;                ecm: B1/2 = 1e8/1e12; sigma: 1:421540381
   Dec 01, 2025  n = 4500M: 3873372485949783947505228373607023795501;               ecm: B1/2 = 2e7/1e11; sigma: 3:2573048001
   Dec 01, 2025  n = 4940L: 323513498930082919004816752992178351721238593161;       ecm: B1   = 2e7;      sigma: 3:1500245557
   Dec 01, 2025  n = 6300M: 6237413839189938711110598321568943584501;               ecm: B1/2 = 2e7/1e11; sigma: 3:1912897375

   
- Found by John            
   Nov 25, 2025  n = 9679: 8731993366626702573478756300748972467;                   ecm: B1 = 1e6; sigma: 282982107171835


- Found by YOYO@home/Dingo
   Nov 23, 2025  n =  697: 17197330244963852284951729944354742482088042881277549790486083; ecm: B1 =26e7; sigma: 0:1841309130937600685 

   
- Found by Kurt Beschorner 
   Nov 23, 2025  n =10053: 11897429002540730275166073669043;                        ecm: B1 = 1e6; sigma: 2880219009495013
   Nov 23, 2025  n =10089: 14259395992830372945405078115966489;                     ecm: B1 = 1e6; sigma: 7720465634134014 


- Found by John            
   Nov 16, 2025  n = 9931: 242436817012717437376124014346203853641;                 ecm: B1 = 1e6; sigma: 3777660168348482 

				  
- Found by Alfred Eichhorn 
   Nov 14, 2025  n =52561: 1238349275694000429756109601;                            ecm   
   Nov 14, 2025  n =52567: 1290064649160129760858559;                               ecm   
   Nov 14, 2025  n =52711: 20661579612272570975095337102477;                        ecm   


- Found by Kurt Beschorner 
   Nov 06, 2025  n = 3003: 24378016432059173538941112558551217423002758218439;      ecm: B1 =30e6; sigma: 6772474587441938


- Found by John            
   Oct 29, 2025  n =14423: 58848461806657937705279656579609;                        ecm: B1 = 3e6; sigma: 8749628913907129 


- Found by Kurt Beschorner 
   Oct 28, 2025  n = 1767: 473173868996738254219823034728848586921173;              ecm: B1 =20e6; sigma: 3:3091771627 
   Oct 28, 2025  n = 1805: 250722594237790504417966333821727933829306951;           ecm: B1 =20e6; sigma: 3:1090306176 
   Oct 28, 2025  n =10029: 1318226832454578142811919289;                            ecm: B1 = 1e6; sigma: 6555139459415289 
   Oct 28, 2025  n =10039: 51862704467076299211942531333521;                        ecm: B1 = 1e6; sigma: 8818260527267191 
   Oct 28, 2025  n =10039: 419994847161234661215971116174117;                       ecm: B1 = 1e6; sigma: 4880169735249008 
  

- Found by NFS@Home 
   Oct 17, 2025  n =  664: 1562991265125451104418437309740711629072891358581803270840637578907766549785968712630129249; SNFS 


- Found by Kurt Beschorner 
   Oct 12, 2025  n =  785: 189851818311923625620843142554739715438256763542951;     ecm: B1 =26e7; sigma: 1156993855260035
   Oct 12, 2025  n = 1773: 198921028618536231202088585479994892998936557;           ecm: B1 =20e6; sigma: 3:1983275677
   Oct 12, 2025  n = 1815: 419823029870495755682192171518286548438201;              ecm: B1 =30e6; sigma: 3:2227611172
   Oct 12, 2025  n = 5608: 1405963188112846152968991141884229858562777;             ecm: B1 = 1e6; sigma: 7628637002786974 
   Oct 12, 2025  n = 7250: 628589002887238236168874184839054919064001;              ecm: B1 = 1e6; sigma: 6496284170981008 
   Oct 12, 2025  n =10766: 17389139753916192903768529053807373;                     ecm: B1 = 1e6; sigma: 8289677374114743 
   Oct 12, 2025  n =11648: 77376942309914204739808700943361;                        ecm: B1 = 1e6; sigma: 3731333862198610
   Oct 12, 2025  n=100671: 685038726211152037;                                      P-1: B1 =35e6  
   Oct 12, 2025  n=100671: 91409754190037219375630209;                              P-1: B1 =35e6  

 
- Found by Torbjörn Granlund 
   Oct 04, 2025  n = 1472: 186078920500246031127942289886722997738325697;           ecm   

 
- Found by YOYO@home/cenes       
   Sep 30, 2025  n = 1800: 676486289910305243115743976857467256769005018068801;     ecm: B1 =85e7; sigma: 0:10291666828356324878 
 

- Found by Kurt Beschorner 
   Sep 30, 2025  n =  849: 6665745840890644685531091049825511205035173717;          ecm: B1 = 3e6; sigma: 3327356337 
   Sep 30, 2025  n = 4858: 3880271832350785813127370764867714215517;                ecm: B1 = 6e6; sigma: 3:2553502215 
   Sep 30, 2025  n=10300M: 13189157147838102082482650675858339733901;               ecm: B1 = 6e6; sigma: 3:111371351
   Sep 30, 2025  n =20024: 82832803766514021925833504161;                           ecm: B1 = 1e6; sigma: 104852919414352          
   Sep 30, 2025  n =33555: 2764081801698243073951;                                  P-1: B1 = 300e6            
   Sep 30, 2025  n=100665: 1592554594537771821133947534057751;                      P-1: B1 = 300e6  
 
 
- Found by Kurt Beschorner 
   Sep 24, 2025  n = 1737: 374643318663224776797087808134396514017991;              ecm: B1 =11e6; sigma: 3:3210609035
   Sep 24, 2025  n = 2835: 382841290339047580948836872349134978125128631;           ecm: B1 =11e6; sigma: 3:1589364952
   Sep 24, 2025  n=10580M: 6570298189028049671955767182606612734856972321;          ecm: B1 = 6e6; sigma: 3:3054475421 
   Sep 24, 2025  n =15027: 4182598491090965431194483199;                            P-1: B1 = 150e6            
   Sep 24, 2025  n =15027: 25000864524514865340417957841201;                        P-1: B1 = 150e6            
   Sep 24, 2025  n =15033: 4748466597487224086119088443;                            P-1: B1 = 250e6            
   Sep 24, 2025  n =15037: 42806614765983366751426454005801;                        P-1: B1 = 250e6            
   Sep 24, 2025  n =15041: 63512551845982133110919;                                 P-1: B1 = 250e6            

   
- Found by Torbjörn Granlund 
   Sep 22, 2025  n =2900M: 6033033132690057373999077534888050305482001;             ecm   
   Sep 22, 2025  n =3940M: 51010270021344674871591579498841356967215001;            ecm   


- Found by Torbjörn Granlund 
   Sep 16, 2025  n = 1916: 10226546821709282341572622484214465901185349;            ecm   
 
 
- Found by Alfred Reich    
   Sep 16, 2025  n = 2258: 52874014350801951051108908233818746760979;               ecm   
   Sep 16, 2025  n = 8542: 17931120838017673840027504869107406677;                  ecm   
   Sep 16, 2025  n = 9194: 1667300272156337810113084656668394139;                   ecm   
   Sep 16, 2025  n =10786: 729914506072054827065390364470411767;                    ecm   
   Sep 16, 2025  n =12226: 2580548816983922435815679475699119371;                   ecm   
   Sep 16, 2025  n =12434: 10644871877697887832917616752925689;                     ecm   

 
- Found by Kurt Beschorner 
   Sep 14, 2025  n = 1398: 97829644721777630795842442531391034522052011;            ecm: B1 = 3e6; sigma: 2651071350
   Sep 14, 2025  n = 1706: 273616243605203095321334459213437522758336721927;        ecm: B1 =20e6; sigma: 3:637627561 
   Sep 14, 2025  n = 5584: 33032585669354748100507532307619217;                     ecm: B1 = 1e6; sigma: 0:8727546104645156 
   Sep 14, 2025  n = 6217: 91732344502157195313784261059592121;                     ecm: B1 = 1e6; sigma: 5453357092045402 
   Sep 14, 2025  n =10036: 35412413276700529015461294244357049;                     ecm: B1 = 1e6; sigma: 8297072652981896


- Found by Anonymous  
   Sep 06, 2025  n = 3238: 88376853595525515029074288804105939891 
   Sep 06, 2025  n = 3986: 25555944415936379078066369218667934588173 


- Found by Torbjörn Granlund 
   Sep 02, 2025  n = 1695: 3589492355981051731952052034695940490303247751;          ecm: B1/2 = 3e6/1e10; sigma = 1:4277327597 
   Sep 02, 2025  n = 2222: 2918644992157154213086063524625094205307903;             ecm: B1/2 = 3e6/1e10; sigma = 1:2987761698 
   Sep 02, 2025  n = 2262: 16087663360588803253849167238238929939;                  ecm: B1/2 = 3e6/1e10; sigma = 1:697874091 
   Sep 02, 2025  n = 2590: 1587566981848255160768964580712527697515091;             ecm: B1/2 = 3e6/1e10; sigma = 1:3594502645 
   Sep 02, 2025  n = 3015: 145561727061614082264058665770390854831;                 ecm: B1/2 = 2e6/1e10; sigma = 0:9283897034382382548 
   Sep 02, 2025  n = 3495: 387453933028530938632676729870153370630391;              ecm: B1/2 = 2e6/1e10; sigma = 0:16005981700032064947 
   Sep 02, 2025  n = 7740: 36821525146880395030522367502885042322081;               ecm: B1/2 = 3e6/1e10; sigma = 1:525306835 
   Sep 02, 2025  n =23220: 1753801360355145706859984612168517841;                   ecm: B1/2 = 2e6/1e10; sigma = 0:5078811757710992863 
   

- Found by Kurt Beschorner 
   Sep 01, 2025  n = 1278: 158720442461371770292217981455847347981577942503;        ecm: B1 =11e6; sigma: 3746762614
   Sep 01, 2025  n = 1554: 116462699941346570110788260883522270500646769;           ecm: B1 =11e6; sigma: 1916824559
   Sep 01, 2025  n = 1734: 81377921661876815257762625738857311135506265389843731;   ecm: B1 =11e6; sigma: 1492419122
   Sep 01, 2025  n = 1784: 1506299242872513223456886300848222812688553;             ecm: B1 = 3e6; sigma: 3:1325250992
   Sep 01, 2025  n = 8262: 47834304614166196220391418206434330161;                  ecm: B1 = 1e6; sigma: 0:582667912455680
   Sep 01, 2025  n = 9945: 3771493051636833160947409738692384129946962271;          ecm: B1 = 1e6; sigma: 8483609740963473


ECM efforts
with Rn:         1 < n < 2000 (Jan 09, 2026) with Rn:     1999 < n < 3000 (Jan 07, 2026)
with Rn:     2999 < n < 4000 (Dec 31, 2025) with Rn:     3999 < n < 5000 (Jan 09, 2025)
with Rn:     4999 < n < 6000 (Dec 14, 2025) with Rn:     5999 < n < 7000 (Jan 07, 2026)
with Rn:     6999 < n < 8000 (Jan 03, 2026) with Rn:     7999 < n < 9000 (Dec 01, 2025)
with Rn:     8999 < n <10000 (Dec 01, 2025) with Rn:     9999 < n <11000 (Jan 09, 2026)
with Rn:   10999 < n <12000 (Nov 14, 2025) with Rn:   11999 < n <14980L/M (Dec 31, 2025)



currently ECM-efforts by   yoyo@home:    ecm-curves
B1 = 11e7/17000 curves/
numbers < 951 digits		 737
in progress		 ....
in progress		 ....
in progress		 ....
in progress		 ....
in progress
B1 = 26e7/42000 curves/
numbers < 600 digits		 673
in progress		 699
in progress		 707
in progress		 747
in progress		 ....
in progress
B1 = 85e7/70000 curves/
numbers < 400 digits		 741
in progress		 1236
in progress		 1638
in progress		 1722
in progress		 ....
in progress
B1 = 29e8/nnnn curves/
numbers < 400 digits		 ....
in progress		 ....
in progress		 ....
in progress		 ....
in progress		 ....
in progress



Factorizations
Repunits: R1      - R2500 (Jan 07, 2026) Repunits:  R2501 - R5000 (Dec 03, 2025)
Repunits: R5001   - R7500 (Jan 03, 2025) Repunits: R7501 - R10000 (Dec 01, 2024)
Repunits: R10001 - R12500 (Jan 01, 2025) Repunits: R12501 - R14980L/M (Sep 24, 2025)




Rprime project; base 10

last update: Dec 19, 2022

old project page   -   out of date

Status:       3 - 1M     1M - 2M     2M - 3M     3M - 4M     4M - 5M     5M - 6M     6M - 7M     7M - 8M     8M - 9M     9M - 10M    
Details:     3 - 1M     1M - 2M     2M - 3M     3M - 4M     4M - 5M     5M - 6M     6M - 7M     7M - 8M     8M - 9M     9M - 10M    

active members:
    - Danilo Nitsche, Kurt Beschorner

all contributors:   Danilo Nitsche, Serge Batalov, Paul Bourdelais, Benjamin Chaffin, Charles, Bo Chen, Alfred Eichhorn, FactorDB.com, Giovanni Di Maria,
                              Fan Ming, Phil, Richard Kapek, kkmrkkblmbrbk (aka GP2), Pavlos, Ryan Propper, Edo Rajh, Alfred Reich, Nejc Skoberne, Sebastian,
                              MattStath, Maksym Voznyy, wims, Kurt Beschorner
Overview
 
    Exponent     Primes/PRP                     found by ...
    - 10ˆ10     R2 = prime
    - 10ˆ20     R19 = prime
    - 10ˆ100     R23 = prime
    - 10ˆ1000     R317 = prime
    - 10ˆ10000     R1031 = prime                 WD (Dec 1985)
    - 10ˆ50000     R49081 = prime               Paul Underwood (Mar 2022)
    - 10ˆ100000     R86453 = prime               Andreas Enge (May 15, 2023)
    - 10ˆ250000     R109297 = prime             A. Enge/P. Underwood (May 2025)
    - 10ˆ500000     R270343 = PRP               Maksym Voznyy - Anton Budnyy (Jul 2007)
    - 10ˆ7500000     R5794777 = PRP             S. Batalov - Ryan Propper (Apr 2021)
    - 10ˆ10000000     R8177207 = PRP             S. Batalov - Ryan Propper (May 2021)

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