is 2 260539 - 1
has 78431 decimal digits
takes 0.002 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ecm on 2022-05-24, 0.0% done, ETC 2022-05-25
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actualunknown30000000100358126969105,417.947373.0611%5,417.947373.0611%73.0611%
PrimeNet2400.000055.0000%2800700000.000114.4069%0.000161.4831%6.4831%
GPU722440.000059.0909%50001200000.000110.5553%0.000163.4090%4.3181%
Difference-440.0000-59.0909%+29995000+10035812576910+5,417.9472+62.5058%+5,417.9472+9.6521%+9.6521%

Known prime factors (2 factors, 103.6 bits, 0.03976537% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
26053915111263823.84929
29
-1294.316e-122.502e-82.502e-8
26053910202408149767447899158572579.7551957942601638804152
23 × 32 × 157 × 7621 × 22727718703
2014-08-22762122727718703507,76112.26922.915

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2605391541712727844792940429826299739132103.604
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-09-18T04:32:08Oliver KruseOllaptop30000000300000000024-
skipped known factor: 15111263
--1.901--44.102%
2022-05-02T23:40:28Oliver KruseThreadripper-PC3000000010035812696910-
skipped known factor: 15111263
skipped known factor: 1020240814976744789915857
--5,418--63.208%


Trial Factoring results:
No TF results for M260539


ECM factoring results:

Old Calculation Method

Total ECM effort:10.890 GHz-days
Estimated T-Level:26.820
DigitsB1CurvesCompleteFacMiss
2011000521 / 1005.2100.532%
2550000514 / 2801.83615.898%
30250000233 / 6400.36469.465%

New Calculation Method

Total ECM effort:10.890 GHz-days
Estimated T-Level:26.820
DigitsB1CompleteFacMiss
201100028.5160.000%
25500003.6552.586%
302500000.35770.003%
3510000000.02897.259%
4030000000.00299.821%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002812.049
25000025000070.171
250000250000002057.473
2500003650000070.294
25000038500000210.903


Lucas-Lehmer results:
No L-L results for M260539


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T08:23:32Oliver KruseOllaptop
15111263
1020240814976744789915857
EB79E6B61FB305__no
2017-09-22T10:06:52Oliver KruseManual testing
15111263
1020240814976744789915857
EB79E6B61FB305__no
2017-10-12T19:02:05kkmrkkblmbrbkc4.xlargeEB79E6B61FB305__no
2020-04-17T21:10:04Oliver KruseAddPrpType5
15111263
1020240814976744789915857
782FD417C3C3CC__no


P-1 factor-bounds graph:
B1 = 30000000, B2 = 10035812696910 (P-1 stage 2)
B1 = 30000000, B2 = 3000000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
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100
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1010
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TF factor-bounds graph:
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2100
Last modified: 2022-05-25T06:51:03+00:00