is 2 3773087 - 1
has 1135813 decimal digits
takes 0.396 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L6C014F835FAF6ED0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.875267.1642 %1600000660000000.77807.9537 %8.653269.7758 %
Target2640.943365.6250 %2400022500000.02212.1605 %0.965566.3677 %
Difference+3+6.9319+1.5392 %+1576000+63750000+0.7559+5.7932%+7.6878+3.4082 %

Known prime factors (1 factor, 90.2 bits, 0.00239001% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
377308713995384185676335564756664972890.177185463311416836340704
25 × 3 × 227 × 8377 × 233683 × 4347557
2016-02-192336834347557112,543,3390.06970.0724

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-13Carsten Kossendeymother20000265000--0.0051.783%
2012-04-10Squeeky_SquirrelP4_260011000020350006--0.0334.153%
2016-02-19mikrMSI1600000660000001222890.1770.77810.155%
2022-03-05JossManual testing9000090000--0.0141.463%
2022-03-22JossManual testing100000100000--0.0151.545%
2022-05-24JossManual testing100000130364850--1.3028.124%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-27ANONYMOUSv4_computers212600.020
2009-03-02S485122USB-A2602610.041
2011-04-17markrManual testing212620.081
2012-03-23GrunwalderGIMPManual testing212630.423
2016-02-23Mark RoseManual testing2622630.260
2015-01-25VictordeHollanderManual testing2632651.511


ECM factoring results:
Total ECM effort:1.197 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.197


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-15ANONYMOUSv4_computers6C014F835FAF6ED00.396


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
1399538418567633556475666497
03B1F8AE064AA3D3
2017-12-07Oliver KruseGTX-2
1399538418567633556475666497
03B1F8AE064AA3D3


CERT results:
No CERT results for M3773087


P-1 factor-bounds graph:
B1 = 100000, 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 = 110000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (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=1.73 ~= -11-bit
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00