is 2 101287 - 1
has 30491 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267293.363674.6269%100000000065802845007901,158.252225.4647%1,451.615881.0881%
Target2440.000061.3636%12001440000.00004.1591%0.000162.9706%
Difference+23+293.3636+13.2632%+999998800+6580284356790+1,158.2521+21.3056%+1,451.6157+18.1175%

Known prime factors (1 factor, 24.0 bits, 0.02371519% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10128717016217824.02084
22 × 3 × 7
-472.247e-111.342e-82.623e-8

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-11-02kkmrkkblmbrbkManual testing100000000200000000012-
skipped known factor: 17016217
--0.656--11.734%
2021-12-17Seth_TrManual testing10000000006580284500790-
skipped known factor: 17016217
--1,158--25.465%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2018-10-25J.R. AllenManual testing252257--0.184--
2022-04-13LordJuliusManual testing2125724.02082.24675e-110.0004.79250e-11
2018-11-02J.R. AllenManual testing257258--0.190--
2022-04-13LordJuliusManual testing257258--0.190--
2018-11-02J.R. AllenManual testing258259--0.379--
2022-04-13LordJuliusManual testing258259--0.379--
2018-11-02J.R. AllenManual testing259260--0.758--
2022-04-13LordJuliusManual testing259260--0.758--
2022-04-13LordJuliusManual testing260261--1.516--
2022-04-13LordJuliusManual testing261262--3.033--
2022-12-08LordJuliusManual testing262263--9.69--
2022-12-08LordJuliusManual testing263264--19.38--


ECM factoring results:
Total ECM effort:12.598 GHz-days
Estimated T-Level:30.756
DigitsB1CompleteFacMiss
201100082.4900.000%
255000012.9390.000%
302500001.54521.330%
3510000000.15185.963%
4030000000.01398.746%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002810.652
250000250000005856.791
10000001000000001115.154


Lucas-Lehmer results:
No L-L results for M101287


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KruseOliver-PC
17016217
A2C2C14674AB53__no
2017-09-21Oliver KruseManual testing
17016217
A2C2C14674AB53__no
2017-10-13kkmrkkblmbrbkManual testing
17016217
A2C2C14674AB53__no
2020-04-17Oliver KruseAddPrpType5
17016217
9EEFC141B6D71D__no
2022-04-15LordJuliusWhiteBox
17016217
9EEFC141B6D71DFFno


P-1 factor-bounds graph:
B1 = 1000000000, B2 = 6580284500790 (P-1 stage 2)
B1 = 1000000000 (P-1 stage 1)
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
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261
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257
this exponent TF target: 44
TF double-checked to: 67.8
ECM T-Level=30.76 ~= 86-bit
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Last modified: 2023-06-05T21:50:05+00:00