is 2 1492643 - 1
has 449331 decimal digits
takes 0.067 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
Actual26719.906968.6567%500000150000000.08354.9454%19.990570.2068%1.5501%
PrimeNet2570.012963.1579%65001000000.00082.3381%0.013664.0193%0.8614%
GPU722610.205865.5738%6000500000.00050.9469%0.206365.8998%0.3260%
Difference+6+19.7011+3.0829%+494000+14950000+0.0830+3.9985%+19.7841+4.3070%+4.3070%

Known prime factors (4 factors, 143.6 bits, 0.00962297% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14926432985287721.5091
1
-111.872e-136.477e-81.318e-7
149264335017404791031.7051173
3 × 17 × 23
2008-07-1517232.403e-101.122e-62.241e-6
1492643154161751241591443.8105164053
3 × 37 × 46523
2008-09-3037465231.382e-60.00020.0003
14926431075622905733771546.61236030816
25 × 32 × 125107
2014-02-18321251071.179e-50.00040.0008

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1492643104537003293324731753.215
1492643460217071878752486332065.319
14926433211043077389249041992168.122
1492643539834444636204211321612375.515
14926433766552269147543606275832478.318
149264316581991082348566082749149432890.422
14926431611560749724680161403655152073097.024
149264311244239523906663009748353713213199.827
1492643495020024122511037954719600544364134111.931
1492643580658293954769962395691601618507769737122.127
14926431733431656385353356730346994320910204284403944143.637
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:15:24alpertronManual testing5000001500000012-
skipped known factor: 2985287
skipped known factor: 3501740479
skipped known factor: 15416175124159
skipped known factor: 107562290573377
--0.084--4.945%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-30T13:29:00markrManual testing??43.810145.96944e-70.1481.32737e-6
2008-07-15T10:02:00J FeitsmaManual testing??31.705104.86624e-110.1481.08207e-10
2014-02-18T11:24:00TJAOIManual testing??46.612155.51370e-60.1481.22594e-5


ECM factoring results:

Old Calculation Method

Total ECM effort:31.104 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:31.104 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025113.97
250000400000005017.13


Lucas-Lehmer results:
No L-L results for M1492643


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T08:15:22Oliver KruseGTX-1
2985287
3501740479
15416175124159
107562290573377
4CAE142D0490F0EBno
2017-10-05T21:18:10Oliver KruseManual testing
2985287
3501740479
15416175124159
107562290573377
4CAE142D0490F0__no
2017-10-28T22:04:20kkmrkkblmbrbkc4.xlarge
2985287
3501740479
15416175124159
107562290573377
4CAE142D0490F0__no


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:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-02-10T10:44:32+00:00