is 2 16883 - 1
has 5083 decimal digits
takes 0.000 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
Actual2671,759.990477.6119%1000000001000000000.04275.9519%1,760.033078.9445%1.3325%
PrimeNet2400.000062.5000%500100000.00003.5361%0.000063.8260%1.3260%
GPU722440.000165.9091%500100000.00001.4821%0.000166.4143%0.5053%
Difference+23+1,759.9902+11.7028%+99999500+99990000+0.0427+4.4698%+1,760.0329+12.5301%+12.5301%

Known prime factors (5 factors, 318.2 bits, 1.88452448% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1688333767515.0431
1
-112.586e-134.265e-108.681e-10
1688312054463823.523357
3 × 7 × 17
2008-08-267177.131e-113.218e-96.077e-9
168831230148631777824811856.7723643157708280
23 × 32 × 5 × 41 × 379 × 651257
2008-08-263796512570.86401.529e-52.827e-5
168833229601365142060717308085782013098.0279564654875146776986637700
22 × 52 × 7 × 2069 × 734443 × 8991925028633
2011-04-0573444389919250286336.106e+12208.97390.29
168833700338629347969632674222180972158162338124.7991095877103994541738042475324578617
3 × 365292367998180579347491774859539
2021-12-2033652923679981805793474917748595399.429e+128.489e+211.586e+22

26 Composite Factors:
exponentprime factorscomposite factordigitsbits*
168834070430521211238.566
1688341538428849241810359272271.815
1688314828781166266413392627032580.295
16883500723453641317981028836922012995.338
168831090539492967519642413421326011316735113.071
16883389311101608544606605437796600656106337121.550
1688313145867968015725731245818077814354741432142136.594
16883124949334497192890586510460384886864666384143139.842
1688344605595094945814062195002334308184597593344945148.322
168833972889700517301180132783730418791463165629668147154.799
168831506197129571035303438138643822584469306934477238350163.365
1688313415256651736770894954370822505133133671381700273
27
52169.842
1688347891051897966887935766976565335296197445945705813
7303
54178.322
1688345519665020070364575720121883333312722812753491809
46663
55181.571
1688316171371494386479049270434976816769466991572486482
122310401
59193.365
1688315370625287327160006283413556345159707112182471579
3025969521
60196.614
1688354871511775683246717452890759813173488457559289513
801854106969
62205.094
1688318528463381294961919082317622866114291847464045290
12547207630022223
67220.137
1688311950618688830104545631208084817366419094350273267
035458569600000223
68222.826
1688340353654126572614019232900340002801187355892567740
7986329519683207530041
72237.870
1688314405829081161100853144320950373180525641533887813
7368055015276127488145249
75246.349
1688348644163058356689250812428553125118680933767478980
64507113700828996892200622983
79261.393
1688314701037228962855809416832846899945944117819168126
36294016523059331708513666245493263
85279.598
1688349640992411038875211657819474127047469502639985012
289740055934144453801380968111571011721
89294.641
1688317721310933815527372895026313014006308536831880287
002138679298607360885004774750647455582769
92303.121
1688359839550630214891280054635351154395102036320210165
1201216783876074755003956229005112632663360823
96318.164
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-12-16T20:05:14Lisander ViaeneDesktop100000000100000000-
skipped known factor: 33767
skipped known factor: 12054463
skipped known factor: 123014863177782481
--0.043--5.952%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26T19:58:00ANONYMOUSManual testing??23.52385.11482e-121.90426e-51.96116e-11


ECM factoring results:

Old Calculation Method

Total ECM effort:22.814 GHz-days
Estimated T-Level:35.728
DigitsB1CurvesCompleteFacMiss
20110002757 / 10027.5700.000%
25500002757 / 2809.8460.005%
302500002689 / 6404.2021.492%
3510000002231 / 15801.41224.354%
403000000684 / 47000.14686.455%

New Calculation Method

Total ECM effort:22.814 GHz-days
Estimated T-Level:35.728
DigitsB1CompleteFacMiss
2011000398.1600.000%
255000082.4880.000%
3025000013.8170.000%
3510000001.88215.227%
4030000000.21580.658%
45110000000.02197.879%
50440000000.00299.810%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
10.00000e+0
500005000000680.021
250000250000004580.703
10000001000000001,5479.495
300000030000000059911.03
3000000300000000851.565


Lucas-Lehmer results:
No L-L results for M16883


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21T19:17:46Oliver KrusePRP
33767
12054463
123014863177782481
322960136514206071730808578201
320CEF5C7FBE308Dno
2017-09-21T21:28:34Oliver KruseManual testing
33767
12054463
123014863177782481
322960136514206071730808578201
320CEF5C7FBE308Dno
2017-10-02T10:06:44kkmrkkblmbrbkManual testing
33767
12054463
123014863177782481
322960136514206071730808578201
320CEF5C7FBE30__no
2017-12-07T02:54:49ATHManual testing
33767
12054463
123014863177782481
322960136514206071730808578201
320CEF5C7FBE30__no
2020-04-17T13:48:00Oliver KruseManual testing
33767
12054463
123014863177782481
322960136514206071730808578201
04ED01A905D4A1__no
2021-12-20T10:34:28mikrNitron
33767
12054463
123014863177782481
322960136514206071730808578201
37003386293479696326742221809721581623
04ED01A905D4A1D1no
2022-05-12T18:18:35Jorge CoveiroManual testing
33767
04ED01A905D4A1D1no


P-1 factor-bounds graph:
B1 = 100000000 (P-1 stage 1)
100
101
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103
104
105
106
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108
100
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TF factor-bounds graph:
267
2
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Last modified: 2022-05-12T18:18:35+00:00