is 2 3930743 - 1
has 1183272 decimal digits
takes 0.490 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L1A997ED4A9F9BEEBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26815.163867.6471 %10000002075100302.21568.2792 %17.379470.3256 %
Target2640.905565.6250 %2600025000000.02912.2811 %0.934666.4091 %
Difference+4+14.2583+2.0221 %+974000+205010030+2.1865+5.9982%+16.4448+3.9165 %

Known prime factors (1 factor, 74.4 bits, 0.00189282% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3930743249548025080440953268312374.4023174311129987905
5 × 173 × 397 × 17333 × 533297
2011-09-30173335332971,180.80.00820.0098

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-12Carsten Kossendeymother20000285000--0.0061.834%
2011-09-30Squeeky_SquirrelT7500_22002374.4020.0240.000%
2022-01-27JossManual testing1000000134869350
skipped known factor: 24954802508044095326831
--1.50010.844%
2022-09-10JossManual testing1000000207510030
skipped known factor: 24954802508044095326831
--2.21611.441%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1997-11-21Amperiov4_computers212600.020
2009-01-04Architects Cubedtcu_22602610.039
2011-03-04Grant McCrackenthumper2612620.078
2022-06-20LordJuliusManual testing262267
2022-01-27JossManual testing267268


ECM factoring results:
Total ECM effort:0.355 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.355


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-28garyfuv4_computers1A997ED4A9F9BEEB0.490
1999-12-01ANONYMOUSv4_computers1A997ED4A9F9BEEB0.490


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
24954802508044095326831
20A350C1CAF456F5
2017-12-30Chang Chia-Tcheex01
24954802508044095326831
20A350C1CAF456F5


CERT results:
No CERT results for M3930743


P-1 factor-bounds graph:
B1 = 1000000, B2 = 207510030 (P-1 stage 2)
B1 = 1000000, B2 = 134869350 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 20000, B2 = 285000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
262
261
260
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00