is 2 1701391 - 1
has 512170 decimal digits
takes 0.080 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L7332A69430679927double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26717.464568.6567 %30000002730000001.20869.5048 %18.673071.6358 %
Target2610.180565.5738 %70005000000.00231.3015 %0.182966.0218 %
Difference+6+17.2839+3.0829 %+2993000+272500000+1.2063+8.2033%+18.4902+5.6140 %

Known prime factors (2 factors, 165.8 bits, 0.00974590% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17013916087768864505865898285112479.010178905638518890305
5 × 11 × 2296079 × 1416688969
2020-02-2422960791416688969143,0655.41539.838
17013911352414343753558656441194792786.80639744372215250893429
151 × 181 × 857 × 21673 × 78292519
2018-03-02216737829251914,292,9620.29250.5437

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-01-27JossManual testing5000050000--0.0041.406%
2011-02-09Carsten Kossendeymother9000015075006--0.0114.717%
2014-03-31JossManual testing100000100000--0.0082.011%
2014-05-03JossManual testing150000150000--0.0122.423%
2014-10-01JossManual testing187725187725--0.0152.670%
2018-01-14JossManual testing17013913000000012--0.25510.637%
2018-02-12JossManual testing17013916000000012--0.38411.785%
2018-03-02JossManual testing17013911200000001222786.8060.64112.919%
2021-07-15Dylan Delgadolaptop-ryzen737003000000273000000
skipped known factor: 135241434375355865644119479
--1.20914.708%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-01-29ANONYMOUSv4_computers212570.011
2003-02-09ANONYMOUSv4_computers212580.023
2016-02-23Mark RoseManual testing2582600.068
2010-04-22Architects Cubeda3_bu22602610.090
2010-10-04GrunwalderGIMPManual testing212630.938
2016-02-23Mark RoseManual testing2612630.758
2015-04-27snme2pm1Manual testing2632653.350
2015-08-30ramgeisManual testing2652664.392


ECM factoring results:
Total ECM effort:37.809 GHz-days
Estimated T-Level:25.718
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001177.456
5000050000001349.182
250000400000005021.17


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-01ANONYMOUSv4_computers7332A694306799270.080
2015-07-19MadPooManual testing7332A694306799270.092


PRP results:
dateuseridcompidcofactorsres64
2018-03-07Oliver KruseGTX-6
135241434375355865644119479
5186A3173A422B2C
2018-03-08kkmrkkblmbrbkc5.xlarge
135241434375355865644119479
5186A3173A422B2C
2020-02-25rbanovkompro_lnx01
135241434375355865644119479
608776886450586589828511
5186A3173A422B2C
2020-02-26Jinyuan WangManual testing
608776886450586589828511
135241434375355865644119479
5186A3173A422B2C


CERT results:
No CERT results for M1701391


P-1 factor-bounds graph:
B1 = 3000000, B2 = 273000000 (P-1 stage 2)
B1 = 1701391, B2 = 120000000 (P-1 stage 2)
B1 = 1701391, B2 = 60000000 (P-1 stage 2)
B1 = 1701391, B2 = 30000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1701391 (P-1 stage 1)
B1 = 187725 (P-1 stage 1)
B1 = 90000, B2 = 1507500 (P-1 stage 2)
B1 = 150000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
266
265
263
261
260
258
257
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
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Last modified: 2024-03-13T02:15:48+00:00