is 2 20647883 - 1
has 6215633 decimal digits
takes 14.633 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2682.886763.2353%----2.886763.2353%0.0000%
PrimeNet2650.353361.5385%10000032000000.27635.0967%0.629763.4987%1.9603%
GPU722695.782063.7681%15000045000000.39773.7751%6.179765.1359%1.3678%
Difference-1-2.8953-0.5328%-150000-4500000-0.3977-3.7751%-3.2930-1.9006%-1.9006%

Known prime factors (6 factors, 279.5 bits, 0.00135372% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2064788341295767825.2991
1
-112.165e-131.028e-62.091e-6
2064788383004489671032.951201
3 × 67
2008-09-083672.892e-116.666e-66.666e-6
206478831605870517230311547.1903888705
3 × 5 × 43 × 6029
2008-10-014360291.554e-60.00040.0006
2064788392339569767644231653.036223605417
3 × 7 × 113 × 94229
2014-09-02113942298.374e-50.00540.0099
20647883189796257714962871754.075459602221
13 × 433 × 81649
2014-10-31433816490.00010.00500.0085
206478831438485536943179256792166.9633483372936933
33 × 937 × 137688167
2021-02-039371376881670.84267.709514.397

57 Composite Factors:
exponentprime factorscomposite factordigitsbits*
206478833427734065366226891858.250
2064788366315654711712367097772272.490
206478833813233358004880260974412478.335
206478837837782036069059093171292479.375
2064788313329446275880082340589772580.141
20647883766459886491066978927010412685.986
206478831575394151290629334734855292787.026
2064788359403363566475422827633007932892.263
2064788311940075789164452599718383235933199.914
20647883148285392663591135815353052611331100.226
20647883304788214545104638797036888589731101.266
206478835504497076477616002778097845035932105.440
2064788317525704780908598377287261819740133107.111
20647883316515488873815495431637318979344734111.286
20647883650571098048605782905755908345574334112.325
206478832310021513239263476738416675061304935114.153
20647883132829135598311872434612317840531821737119.999
20647883273019171688914392565170303389045387337121.038
206478834930745877516763592405146197276713083138125.213
206478836123559024939168927896174683374986367138125.526
2064788312586463092200652154381595641605209799939126.565
20647883723737421143187526885032856175983170156740132.411
206478831230835334355694421788903948287761737527141133.177
206478832529879020574688174009772964555269451839941134.216
2064788395394110175716039786999574962246357866358342139.453
20647883145471218144639736722171928633920253253476743140.062
206478835485281034479292677393473012872545265008743944145.298
2064788311274536100598405238317805164073328666365559145146.338
2064788319174215683314621349334219219728182918877038345147.104
206478831102541461364510708493713588664918030160393183947152.950
206478832266181701616445115119000324944678384130399919147153.989
206478832814401260134340767397071548825342446233604243147154.302
2064788350828289182919851965394300633871457664434277785748158.476
20647883104473294571840528931563040067173665905398231703349159.516
206478836007345529707214866620155698806999074936565743128950165.361
2064788321330639268651606913345613888555872299018370275572
7
51167.189
2064788343843343845386776418904486504809754081344727724906
3
51168.229
2064788379181394326590639093533152202481684515132607528687
61
52172.403
2064788325210472852072948913739118643151572748670210468960
279
53174.074
2064788345530295296348336286961317322240296047602569550722
5513
54178.249
2064788393583711529616240842242414691839726440985492675972
4497
54179.288
2064788311622285868301412502903066316262046535487294839326
89577
55179.601
2064788323360794032405587103967009816272403771260973380326
2118777
57187.252
2064788388086510919928716326910966161376726894201694761977
60107609
58192.489
2064788318105445119399763438761740699572679838705109228061
706616321
59193.528
2064788310410858128590299653446737422729434939126345713671
44413838993
61199.374
2064788317705388268292886608676965931524444334617094666790
09230484009
61200.140
2064788336391943813126647604175570428051356379602187921509
47580067921
61201.179
2064788320925824334257045261968963944903791364612499911075
3933389581793
63207.025
2064788396470190729721157454362641305949799466791445290715
36296941316959
64212.552
2064788340484755078579074996381747722925411053974380668034
29186330048485649
67221.265
2064788373115758857195653314934416337517140804681757557670
628972916932889903
68225.439
2064788315028332323839695809531425834888990770860155050968
6960095698709790407
69226.479
2064788386414796599040905924672429630014780560964984161529
01627589689951170231
70232.324
2064788316718490127770681721261064970187083332641504480364
4846479685267362063947783
75246.564
2064788333604164347123968688153240662441083040101202926045
000781730901473765156374583
77254.215
2064788313877097411085385310612718866910926164516709324536
72583797177163960562510363344290161
85279.515
P-1 results:
No P-1 results for M20647883


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-10-01T01:19:00markrManual testing??47.190156.45641e-730.201.33231e-6
2008-09-08T16:38:00Will EdgingtonManual testing??32.951101.20560e-1230.202.48780e-12
2014-09-02T11:14:00TJAOIManual testing??53.036162.56228e-530.205.28737e-5
2014-10-31T12:08:00TJAOIManual testing254255*54.075172.51574e-830.205.19131e-8
2022-08-10T19:28:57LordJuliusManual testing2126547.190151.55367e-630.203.20606e-6
2022-08-10T19:28:57LordJuliusManual testing2126554.075170.00030.200.000
2022-08-10T19:28:57LordJuliusManual testing2126558.250180.00230.190.004
2022-08-10T19:28:57LordJuliusManual testing2126525.29982.16537e-1330.204.46834e-13
2022-08-10T19:28:57LordJuliusManual testing2126532.951102.89163e-1130.205.96702e-11
2022-08-10T19:28:57LordJuliusManual testing2126553.036168.37364e-530.200.000
2022-08-10T19:28:57LordJuliusManual testing265266--0.362--
2021-02-03T10:23:40TJAOIManual testing266267*66.963210.12729.840.260
2022-08-10T19:28:57LordJuliusManual testing26626766.963210.12729.840.260
2022-08-10T19:28:57LordJuliusManual testing267268--1.448--


ECM factoring results:
No ECM results for M20647883


Lucas-Lehmer results:
No L-L results for M20647883


PRP results:
No PRP results for M20647883


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
266
265
255
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-08-10T19:28:57+00:00