is 2 9271061 - 1
has 2790868 decimal digits
takes 2.562 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L94E939CA74F44C98double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.205064.1791%11000020350000.08613.3730%3.291165.3874%1.2083%
PrimeNet2640.383962.5000%4000011000000.03923.4874%0.423163.8078%1.3078%
GPU722686.429164.7059%6000013000000.05112.4112%6.480365.5569%0.8510%
Difference-1-3.2241-0.5268%+50000+735000+0.0350+0.9618%-3.1891-0.1696%-0.1696%

Known prime factors (1 factor, 75.3 bits, 0.00081242% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
9271061471491581301716373740072375.3202542813499456623
17 × 1427 × 226843 × 462079
2014-06-202268434620791,583.40.09600.1850

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-06-30T00:00:00ANONYMOUSv4_computers4500045000---0.018--0.751%
2012-06-30T07:58:00firejuggler1100002035000---0.086--3.373%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-29T00:00:00ANONYMOUSv4_computers21261--0.033--
1999-11-17T00:00:00ANONYMOUSv4_computers21264--0.384--
2013-09-07T07:14:00NesowaManual testing264265--0.403--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.420 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.420 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.420


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-03-08T00:00:00ANONYMOUSv4_computers94E939CA74F44C982.562
2003-08-08T00:00:00ANONYMOUSv4_computers94E939CA74F44C982.562


PRP results:
dateuseridcompidcofactorsres64PRP
2019-08-18T05:54:14Malottpm03
47149158130171637374007
E2CEDE90F18E1E__no
2020-11-08T06:01:43oodairacom2
47149158130171637374007
E2CEDE90F18E1EF0no


P-1 factor-bounds graph:
B1 = 110000, B2 = 2035000 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 45000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
267
265
264
261
250
260
270
280
290
2100
Last modified: 2020-11-08T06:01:43+00:00