Numbers of the form 10^n − 1 (Jun 11, 2019)

nfactor(s)
3013P41=54801984828194245177182941528875876754999
3375P34=9928227087054120839404714671321001
3763P35=33819951029015563544261960393215363
4005P34=1867328658390232232662140183278161
4541P34=3490250651625330786758706967866961

Numbers of the form 10^n − 1 (May 1, 2019)

nfactor(s)
3369P34=4087010404483958534982337738286521
7585P23=15547667944421212418551
known to factordb since Feb 24, 2019
7843P26=49572320430317139671633561
7921P26=15910331774974069031187991
8791P27=282714061924913089724670761
9019P27=264213269259212217832593757
10159P26=95389333937877911520788747
10313P30=170672934111852276268975918307
10391P27=306883126921945147411270787
10669P25=4639247039875777205953169
11741P24=606576554490357081230933
12217P24=871662968766609227785649
12349P30=166325386891989774440213720479
12623P20=53467624777878097151
12661P21=346233824890535041043
12931P30=483598068316607532069829149283
12937P18=993004496125209791
13031P20=70658782071874394947
P25=6046051685284819252690081
13087P31=1243998737228973830416633563041
13091P22=5739726926183934177157
13141P27=144557561067680353587131453
13157P20=72514570203784572839
13199P19=2492148959777359523
13241P26=14236935046241021556662557
13243P21=726095040868245313271
13333P21=126949541631721679803
P21=553459352474245080559
13387P23=29552324562848476098271
13399P28=8052095254014990733683817879
13429P23=18846461278703470205197
13501P24=160714645063057920859477
13511P22=4341433943193614265283
13543P25=4000432460985064713949027
13547P27=648990779943499443084372769
13667P24=126838187629968807864133
13693P26=23427251325041664183448403
13787P22=1757394197403238846159
13891P25=1735934170839135827817449
14039P18=241159746835622837
14113P21=551572326412773603521
14989P19=7215132725733758879
20771P20=13209599046683370077
22703P17=48604334541257921
25369P16=2306031807390797
25937P17=67459153246632997
26303P22=1539032801536874760803
27263P23=11704867833996086080907
29047P14=27159567941963
29893P15=968231101401787
30337P18=243831293831386307
30551P14=61316184812231
31067P20=18006395973615385159
31631P15=370382591170307
32899P16=2141521360072013
33499P14=40771498970999
34597P19=1200003528192719849
35627P17=16322228861194849
36367P14=90788272265723
36649P15=263138618719079
38509P18=314880082142862763
38537P18=435966028899427639
41567P18=285693503624738711
42221P17=33511744274510071
45043P19=1338140043394864999
45973P14=54011998949933
46591P19=1475602987115586361
47423P15=256737619986959
49219P14=46992462476599
49729P15=727210453002083
53983P16=9042134049258397
55037P23=41686833109486332585637
55631P20=21596992735099032799
56279P16=2745153945063077
59383P16=7486273213374289
60023P17=37020326909908603
63463P22=2708198951484745744759
65869P15=487554741591707
67271P15=189669409006547
68359P17=27163417749156427
70361P16=2240905166691307
70831P14=26688757861957
73201P14=46668431728573
74519P17=79530781841119307
74549P17=43389686411086843
76073P18=344393908113178307
81089P16=1934849442165547
81143P17=26744841685142557
81797P14=52665025770199
83141P15=735341472256519
84257P14=24315396499991
85693P16=1473341034627043
85849P17=34911060387701363
86267P17=40039612309873081
88147P17=72109553594958413
88447P15=198843921177511
88453P14=20585203726999
89893P14=41078745264043
91271P14=21220391585831
91787P18=488761392934968563
91831P14=40497515629867
91859P15=325281034444117
93091P15=385266633225671
94187P18=868391223454399373
96709P14=29961947963173
97057P15=379340889996613
97399P20=43094854494475503683
99101P18=159987961759326761
99811P18=100253214775048597
99941P18=379390235149356239

Numbers of the form 10^n − 1 (April 28, 2019)

nfactor(s)
8413P36=243904395884094668914288576880306533
8737P31=7770910590299873304488185798093
9377P31=4321331760187959083703542399831
10159P26=29437946832889335998236951
10259P30=115361122055246822564853304133
11783P25=2080263724013311300835809
12559P25=4778840951127934697851667
12581P19=2445512734451107507
12773P20=60296045245324124413
12779P19=1506749748512063329
12833P17=36807212618820443
12937P18=262058850066411227
12989P19=9210876865683601877
12997P21=121574395299121946569
13031P18=548817716613458573
13061P18=118691142954131999
P20=96509307226360422893
13069P22=1349265660312356203397
13087P15=571592971890013
13091P19=4443290713184542649
13123P22=2179097622352481546717
13133P17=47776729087159013
P20=13172152262570076133
13157P15=590550898465907
13193P17=23451325309248391
13319P18=422428981799832803
13351P20=28026698468489907161
P20=37458859374925798681
13529P15=429432715502639
13579P18=614169584243455267
13631P19=1614347848993133609
13813P16=4652075018214523
13861P18=604265682843150439
13961P16=6319773321791603
13987P22=7027411937378329548173
14113P19=6804531405856774613
14141P18=630709273731769591
14309P18=266233227045535723
14809P18=296283969375966883
14989P21=119396574302447885587
15083P27=321103436853409015750259267
15103P21=348543597237844273079
15191P18=632037145610952071
known to factordb before Nov 4, 2018
15347P18=127902710469044323
known to factordb before Nov 4, 2018
15371P19=2577406350840940453
15487P18=935239162645494923
P25=1743582023637651243986923
15577P19=2095166797252861973
15599P17=46838916594062591
15751P17=10266197079830917
15793P23=59033421771015516270079
15829P19=5583006188505416507
15889P20=28340715892715335093
15893P25=1921837468520299583102077
16003P23=10094343528191431738711
16313P21=153614332714379275399
16459P23=55718955151289934443239
16589P20=72492481855619932507
16637P24=130558135696811058722557
16859P17=52864341802012711
16663P15=654967470549079
known to factordb before Nov 4, 2018
17173P17=29518631350664587
17219P20=39930944006701407721
17251P23=95645401884063781012147
17309P18=197047365083113277
17399P15=218558481769387
known to factordb before Nov 4, 2018
17407P19=1019667083181292963
17447P19=1014502546032788717
17527P20=16660688003072805521
17821P20=75317223441990240773
17999P15=297922411607347
18023P20=84123467203295920963
18037P23=15855860455739606866919
18313P21=324093184007522256791
18451P21=274059920186681161003
18467P25=3345874935375758991967277
18659P26=43214964502300050068131639
18737P20=39236107553573615831
18871P17=31798634204579653
18943P17=42760228212482479
19027P22=1412889413746642940399
19043P20=69735797571237214643
19127P17=22666057907036191
19247P18=208381320522103013
19487P20=40817005297404744721
19639P20=13474722076382161157
19781P23=30349984016803562399443

Numbers of the form 10^n − 1 (April 25, 2019)

nfactor(s)
6499P25=4165975905806403445675813
6859P23=67060198998473064997241
7103P29=42802214480689253068237806547
7295P26=41232217477282447750778881
7979P30=216251636371721529162346249283

Numbers of the form 10^n + 1 (April 25, 2019)

nfactor(s)
3419P35=11752801686094820502490861046771611
3559P38=93606245741965473665134054924388953019
4486P34=1331980990053596471625571221796349
4817P28=3455074226735489730084375527
6854P26=17303517253012077157833541
7807P25=6725377118748704696140853
8434P28=4483650775938337151558860669
9155P20=32971761628244713811
known to factordb since Feb 24, 2019
9478P20=69055974232189896169
26261P19=4366565567916070973
known to factordb before Nov 4, 2018
36713P21=713449936634564276647
44017P19=2511441699319222379

Numbers of the form 10^n + 1 (April 21, 2019)

nfactor(s)
8939P21=799561367576758181921
9080P20=81895661771812674241
known to factordb since Feb 24, 2019
9229P24=521288766830443861149539
9616P21=285094911781370037857
9788P24=850018252663503356742769
9947P31=3197022798810501273105238852303

Numbers of the form 10^n + 1 (April 21, 2019)

nfactor(s)
7559P31=1239291237280253299562812409579
9277P30=558660194389136210574365412179
known to factordb.com since Dec 7, 2018

Numbers of the form 10^n + 1 (April 20, 2019)

nfactor(s)
15076P21=159141989042800124633
40844P24=377897220200968844448473
53069P20=31936532170031364877
71356P14=42297232876849
71684P16=4913006957313673
96017P16=6111767335518367
96337P19=8901357223738205851
101513P15=107438599467583
103681P14=47546101202099
104393P14=12842462979979
105388P14=10227766287841
107927P15=163968874414649
108503P15=246626030418373
109919P14=50891178411677
111604P14=19676505938633
112687P16=1436712118662251
113537P18=152634344676423721
113567P14=95453305851979
113837P18=139845281222480437
115153P14=92992442176397
115771P15=260326629968201
115796P15=226594620513817
116027P16=1115216117200681
117353P14=26547827314823
117721P15=125174609886691
117748P15=232157338119097
117773P19=1654543974411171409
118684P14=17589222783761
119099P21=523170259365009423019
119747P14=13959279724183
120413P18=220094589037887131
120548P14=20176839878137
120677P14=23885744629171
121276P17=35737195958727257
121351P14=12267356814371
121964P16=1023920605390961
123191P19=1751685275326455481
123817P17=30593485183927859
126341P19=3018208063486919531
126349P15=251947081612409
126433P15=198109827664367
127051P17=61952018191896127
127133P16=1818501312241379
127163P14=17561551096841
127453P15=569152962330727
127541P14=49081328306687
127703P15=303806600885143
129764P14=63071065521601
130201P14=12504814178783
131213P14=47897985909647
133039P17=44577275519329237
134639P14=22874771338453
136373P22=3407047885424093565451
137413P15=211567097399263
137476P14=27905935120537
138517P14=22996841393567
138524P19=2733934418453789249
139493P14=60972419872517
140449P14=27124618179917
141116P14=22102373653889
141181P14=26949279559687
141371P18=117563233064487121
141991P14=15767877624131
144539P16=1193967027101291
145532P15=958624287972289
146581P15=382896133649849
147197P15=239270937048487
149759P15=172045378097051
149867P16=8724395224455023

Numbers of the form 10^n − 1 (April 19, 2019)

nfactor(s)
3101P38=13000387694887231400343819052965179689

Numbers of the form 10^n − 1 (April 14, 2019)

nfactor(s)
7169P28=3669910862324453368414564643
12769P17=28789021522905157
13283P23=53938763495972736373481
13423P21=100487584714052991079
13427P20=61083782749494579773
13493P16=1946942753800237
13579P17=73123016665456999
14477P20=92308999902397966279
14521P18=804592427444565449
14921P18=267651229618919227
14933P18=447058039745331013
14941P21=181485981270759339413
15059P22=5476512392663693178227
15251P18=519954555768322049
15283P17=22229661812222587
15317P15=273622120128157
15403P20=52124283513337560761
15479P15=205220919473159
15857P19=1446771195750708683
15997P15=111065519053799
16123P19=2463046960082776559
16307P20=29560907549234194163
16577P18=293752462142023853
16861P26=94361195011325024357381041
16997P15=580734102049067
17239P25=3626607244638159307438519
17249P24=398621525859305025109249
17251P20=76866625387704112637
17677P18=164340801234251027
18647P24=124505252621444040531667
19451P17=17497862201376919
19897P16=6202882526354357
19903P20=11733055741556419453
19913P19=3786252430836005369
20381P20=37279335025562042893
20779P16=5524049514848987
P22=5670857944018978187027
20831P15=962374046200121
20957P19=3861037938534315551
21689P21=512123364402916678723
21761P16=7499350654120511
21829P19=1321896879390254963
22009P20=95972249141468538437
22357P18=119217517646875853
22439P14=84113402714729
22513P20=13204000158031969631
22643P20=13919924422000514641

Numbers of the form 10^n + 1 (April 14, 2019 (2nd))

nfactor(s)
4030MP37=9563613411880480653886428115541468801
cofactor is proven prime (1363 digits)
4210MP33=961793978153247229732651534445101

Numbers of the form 10^n − 1 (April 13, 2019)

nfactor(s)
10021P22=7618873771098573906077
10033P26=43217151390913466182759729
10061P25=2442928187293475067280907
10253P25=8376830325643136798289587
10279P30=664293596700753079516987364243
10517P27=324658472413082314399314683
10813P25=1303514370635977470417877

Numbers of the form 10^n + 1 (April 13, 2019)

nfactor(s)
3770LP32=92908918613191880421357495998041

Numbers of the form 10^n − 1 (April 12, 2019)

nfactor(s)
10027P26=52978217068799138884110677
10727P29=10667229229660367020468111879
14059P14=35001757292147
16969P16=1614120037500053
27509P21=100125855684067436449
98939P24=193341499151437640230573
107453P21=189680717015940364507
107563P18=479463276459327907
118033P18=587301324845432293
119839P19=1307002090865801597
125117P20=42003287484740137081
146527P20=69704151165727465481
154699P18=333676480361794231
199429P17=79892869870017187
200789P16=3491045703161893
202219P19=1448300976335171477
203173P14=23377441745443
204733P17=28427562028704803
205627P14=92758109397761

Numbers of the form 10^n + 1 (April 11, 2019)

nfactor(s)
3008P32=79405741087335426622525127411969
3071P31=1211889758522439968545637100259
100127P14=97674968469823
100304P15=733932229827521
100318P14=12688642577509
100582P14=22978766981609
100621P14=95162701159481
100888P14=11122353371057
101203P15=153902584327133
101554P14=46117270063069
102142P15=260666342121781
102316P15=156992408434457
103612P15=254500345083913
104582P14=17895329726129
105137P14=11978185234649
105652P14=19470060436553
106346P14=74959095583769
107098P14=22115000808349
107689P14=47528807218721
107719P15=359314789191739
107738P14=98896242929021
108461P14=17164581889957
108671P14=11342273293207
108853P16=1299998572012037
110059P17=48541705342632409
110311P14=46888219601557
111317P17=39393600328921733
111827P15=101307642555529
113081P16=1100708733401521
113248P17=81576843465335873
113426P14=54922634108561
114497P14=68298686533877
114581P14=18495999596521
116096P15=831400729781761
116582P15=257942274159901
117716P16=1342967640726073
118798P14=49654688613209
120262P14=26349393376421
121267P19=1860941667195859447
122068P15=149835122407169
122333P16=1373312289951131
122354P14=28698114793981
125453P17=11307274778586851
126479P15=188258551891169
127384P14=39441198645889
127916P15=175550911189417
128654P14=43574443629589
129721P15=156273302212171
130666P16=2604562963292321
130961P15=430717711476601
131218P14=60654158457161
131497P17=21367715394370783
131723P14=10058426238121
133769P14=50564496596167
135061P15=103667124836167
135502P15=258827415481469
135764P16=1525119561671033
136718P16=2395528327103321
136859P14=27688901481847
137594P14=18802419886489
138007P15=128416610103623
138563P14=11387463724037
138728P14=23018018337409
138821P15=429997111568819
140159P14=17863375275611
140174P14=25787478847969
141653P14=69033125141287
141874P14=36150787672141
143839P16=4984604857643809
145069P17=11353272303442213
145303P16=4172795580841211
146732P14=73382724513361
146824P16=2823941252807809
148094P14=15163694161841
149186P14=79885709018501

Numbers of the form 10^n − 1 (April 11, 2019)

nfactor(s)
3283P31=2324461687392877701088662871133

Numbers of the form 10^n − 1 (April 10, 2019)

nfactor(s)
3187P33=194596748545683302871494620187683
3209P36=470544186358744132446735732236211253

Numbers of the form 10^n − 1 (April 8, 2019, 2nd)

nfactor(s)
3461P39=363333404197572531406681671438464547641
3453P47=60061366931002116328324273314045799654573339003

Numbers of the form 10^n + 1 (April 6, 2019)

nfactor(s)
3069P37=4649700678223371354013752098032052413
3084P36=789623604692467568415491118469360633
3094P31=5781822105649878089905469839201
3113P34=3197838295350890098487501692066693
3124P36=302265719497171388215121034171443993

Numbers of the form 10^n + 1 (April 4, 2019)

nfactor(s)
1304P37=2711533575490636312104255710201930401
2987P32=92600133051876992409909760669939
3061P36=374379568108875916757732764761053303

Numbers of the form 10^n + 1 (April 2, 2019)

nfactor(s)
1124P34=1125096610491026258717069231764777
June 11, 2019
Alfred Reich