is 2 11525671 - 1
has 3469573 decimal digits
takes 4.437 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-
PRPE3C598EE25D3048Bverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2672.578164.1791%14500033350000.17804.0426%2.756065.6272%1.4481%
PrimeNet2640.308862.5000%5000015000000.07204.0219%0.380864.0082%1.5082%
GPU722685.171564.7059%8000020000000.10312.9233%5.274565.7376%1.0317%
Difference-1-2.5934-0.5268%+65000+1335000+0.0749+1.1193%-2.5185-0.1104%-0.1104%

Known prime factors (1 factor, 68.5 bits, 0.00059433% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
115256714175663159071663903432168.50118114620654501
7 × 17 × 19 × 499 × 16055659
2017-10-10499160556598.18140.48860.9121

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-11-16T00:00:00Team Prime Ribv4_computers1450003335000---0.178--4.043%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-09-08T00:00:00ANONYMOUSv4_computers21253--0.000--
2000-09-15T00:00:00ANONYMOUSv4_computers21264--0.309--
2013-11-08T14:42:00lycornManual testing264265--0.324--
2014-12-20T13:10:00NesowaManual testing265266--0.648--
2016-01-15T21:21:56VictordeHollanderManual testing266267--1.297--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.171 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:1.171 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.585
50000500000010.585


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-15T00:00:00ANONYMOUSv4_computersD82CD291D5700D__4.437
2002-11-24T00:00:00Team Prime Ribv4_computers836DD5D0607358__4.437


PRP results:
dateuseridcompidcofactorsres64PRP
2021-08-21T03:35:41MarkSdesktop-i7
417566315907166390343
E3C598EE25D3048Bno


P-1 factor-bounds graph:
B1 = 145000, B2 = 3335000 (P-1 stage 2)
B1 = 145000 (P-1 stage 1)
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106
101
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104
105
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108
TF factor-bounds graph:
267
266
265
264
253
250
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2100
Last modified: 2021-08-21T03:35:41+00:00