is 2 1999603 - 1
has 601941 decimal digits
takes 0.131 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26714.859968.6567 %500000150000000.12305.1229 %14.982970.2624 %
Target2620.307266.1290 %80005500000.00361.2366 %0.310866.5479 %
Difference+5+14.5527+2.5277 %+492000+14450000+0.1194+3.8863%+14.6721+3.7145 %

Known prime factors (2 factors, 103.7 bits, 0.00518489% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1999603131973799926.97633
3 × 11
-3114.503e-123.276e-75.821e-7
19996031228763887155708902739532476.70230725196130324592
24 × 13 × 79 × 853 × 16889 × 129793
2015-10-13168891297938,501.70.00220.0033

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-10-13alpertronManual testing500000150000001222476.7020.1238.185%


Trial Factoring results:
5758596061626364656667
No TF results for M1999603


ECM factoring results:
Total ECM effort:78.276 GHz-days
Estimated T-Level:25.393
DigitsB1CompleteFacMiss
201100012.6910.000%
25500001.21929.556%
302500000.07992.441%
3510000000.00499.624%


ECM Summary

B1B2factorcurvesGHz-days
500005000000272.017
50000530000070.606
50000665000070.583
50000707775370.601
500004304944721674.47


Lucas-Lehmer results:
No L-L results for M1999603


PRP results:
dateuseridcompidcofactorsres64
2017-10-05Oliver KruseGTX-3
131973799
122876388715570890273953
B1C9CCA39F7AB2C0
2017-11-13kkmrkkblmbrbkc4.xlarge
131973799
122876388715570890273953
B1C9CCA39F7AB2C0


CERT results:
No CERT results for M1999603


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=25.39 ~= 68-bit
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270
280
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Last modified: 2024-03-13T02:15:48+00:00