is 2 3749399 - 1
has 1128682 decimal digits
takes 0.394 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LC07181D08133D302double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.925067.1642 %1600000660000000.77807.9485 %8.703069.7741 %
Target2640.949365.6250 %2200022500000.02182.1106 %0.971166.3505 %
Difference+3+6.9757+1.5392 %+1578000+63750000+0.7562+5.8379%+7.7318+3.4236 %

Known prime factors (1 factor, 78.6 bits, 0.00209737% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
37493994705258589272519116457672478.63962746837416776917
109 × 2377 × 37361 × 6482129
2015-11-2837361648212931,0890.05920.1005

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-07Carsten Kossendeymother20000265000--0.0051.781%
2013-03-15Squeeky_SquirrelT7500_220011000020350006--0.0334.149%
2015-11-28mikrMSI1600000660000001222478.6390.77810.149%
2022-05-24JossManual testing200000130364850
skipped known factor: 470525858927251911645767
--1.3199.018%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1997-12-21ANONYMOUSv4_computers212600.020
2009-03-04S485122USB-A2602610.041
2011-05-02markrManual testing212620.082
2012-05-10GrunwalderGIMPManual testing212630.426
2015-01-25VictordeHollanderManual testing2632651.520


ECM factoring results:
Total ECM effort:0.748 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.748


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-02-24ANONYMOUSv4_computersC07181D08133D3020.394
1999-08-16ANONYMOUSv4_computersC07181D08133D3020.394


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
470525858927251911645767
09A26A5C4667A3AA
2017-12-04Oliver KruseGTX-3
470525858927251911645767
09A26A5C4667A3AA


CERT results:
No CERT results for M3749399


P-1 factor-bounds graph:
B1 = 200000, B2 = 130364850 (P-1 stage 2)
B1 = 1600000, B2 = 66000000 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 110000, B2 = 2035000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
265
263
262
261
260
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00