is 2 1666039 - 1
has 501528 decimal digits
takes 0.078 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.835168.6567%500000150000000.08805.0115%17.923170.2275%1.5708%
PrimeNet2570.011563.1579%70001200000.00092.5683%0.012464.1041%0.9462%
GPU722610.184465.5738%7000800000.00071.2061%0.185165.9890%0.4152%
Difference+6+17.6507+3.0829%+493000+14920000+0.0873+3.8054%+17.7380+4.2385%+4.2385%

Known prime factors (2 factors, 103.4 bits, 0.00620766% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1666039757881141111136.14122745
5 × 4549
-545491.057e-81.724e-53.156e-5
16660391792870925107698374172167.28153806391240172
22 × 3 × 2371 × 1891128611
2019-03-082371189112861123.9407.031313.132

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
16660391358783062583563793461651349128732103.422
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:18:07alpertronManual testing5000001500000012-
skipped known factor: 75788114111
--0.088--5.012%


Trial Factoring results:
No TF results for M1666039


ECM factoring results:

Old Calculation Method

Total ECM effort:14.888 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.888 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024814.71
50000500000030.178


Lucas-Lehmer results:
No L-L results for M1666039


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T01:21:05Oliver KruseDoppelherz
75788114111
67549B3C482AE5__no
2017-11-02T21:05:12kkmrkkblmbrbkc4.xlarge
75788114111
67549B3C482AE5__no
2019-03-09T06:57:25artorollofourth
75788114111
179287092510769837417
534724C819B42374no
2019-03-09T20:19:44kkmrkkblmbrbkc5.large
75788114111
179287092510769837417
534724C819B42374no


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
109
1010
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2019-12-02T14:37:12+00:00