is 2 1701523 - 1
has 512210 decimal digits
takes 0.080 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
Actual26717.463168.6567%500000150000000.08805.0243%17.551270.2315%1.5748%
PrimeNet2570.011363.1579%80001300000.00102.7318%0.012364.1643%1.0064%
GPU722610.180565.5738%70001000000.00081.3016%0.181466.0218%0.4481%
Difference+6+17.2826+3.0829%+493000+14900000+0.0872+3.7227%+17.3698+4.2096%+4.2096%

Known prime factors (4 factors, 165.8 bits, 0.00974378% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
170152368060921826.02020
22 × 5
-455.277e-122.767e-75.555e-7
1701523231407129927.78668
22 × 17
2008-07-154171.066e-113.213e-75.555e-7
170152324774174891031.206728
23 × 7 × 13
2008-07-158131.946e-105.645e-71.111e-6
170152320763433494081102557745592580.780610142604422070773
610142604422070773
2019-05-041610142604422070773145,5612.268e+94.237e+9

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1701523157497823257058091753.806
17015231686153160028473691857.227
17015235732920684638790811858.992
1701523390187861816466654854936012685.012
170152314131784067294078887756205390883933106.801
170152348048065330477464360424636943111133108.566
1701523514396932699249014609615570786235134111.987
17015233270195578660465594115176741438766071323141134.587
170152335010328999085903942672891203651855028527142138.007
1701523119035117362339434926890195029338937210027943139.772
17015238101639719023912655743714339566430087675669309695950165.793
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:29:21alpertronManual testing5000001500000012-
skipped known factor: 68060921
skipped known factor: 231407129
skipped known factor: 2477417489
--0.088--5.024%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:45:00J FeitsmaManual testing??27.78691.54669e-130.1743.36247e-13
2008-07-15T07:45:00J FeitsmaManual testing??31.206102.64939e-110.1745.75971e-11


ECM factoring results:

Old Calculation Method

Total ECM effort:206.039 GHz-days
Estimated T-Level:30.000
DigitsB1CurvesCompleteFacMiss
2011000906 / 1009.0600.011%
2550000906 / 2803.2363.910%
30250000640 / 6401.00036.759%

New Calculation Method

Total ECM effort:206.039 GHz-days
DigitsB1CompleteFacMiss
201100061.9140.000%
25500008.4860.021%
302500000.88041.478%
3510000000.07193.106%
4030000000.00599.529%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026415.69
50000500000020.119
25000025000000640190.2


Lucas-Lehmer results:
No L-L results for M1701523


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:07alpertronManual testing
68060921
231407129
2477417489
7C1280D398DB4E__no
2017-10-18T18:14:02Oliver KruseThreadripper
68060921
231407129
2477417489
7C1280D398DB4E__no
2019-05-04T22:50:01ATHec2-PRPCF
68060921
231407129
2477417489
2076343349408110255774559
4D8FFB7217FCCA07no
2019-05-05T22:34:59kkmrkkblmbrbkc5.large
68060921
231407129
2477417489
2076343349408110255774559
4D8FFB7217FCCA07no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-06-04T12:28:18+00:00