is 2 1864739 - 1
has 561343 decimal digits
takes 0.101 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.934668.6567%50000004700000002.386210.6766%18.320872.0031%3.3464%
PrimeNet2570.010363.1579%90001600000.00143.0275%0.011764.2733%1.1154%
GPU722610.164765.5738%100001500000.00141.6887%0.166166.1551%0.5813%
Difference+6+15.7699+3.0829%+4990000+469850000+2.3848+8.9879%+18.1547+5.8480%+5.8480%

Known prime factors (2 factors, 158.9 bits, 0.00852076% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1864739865238897929.689232
23 × 29
-8294.028e-117.193e-71.281e-6
186473978252185529994797469693285141061386065739129.201209820745771914454166758149910152
23 × 33 × 13 × 29 × 59 × 157 × 211 × 15887 × 61673 × 109897 × 12243241
2015-07-18109897122432418.727e+100.06060.0980

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
186473967706834695812058978415808963758443088777437532948158.890
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-07-19T06:15:00alpertronManual testing500000150000001239129.2010.1010.2020.2035.080%
2021-08-05T18:02:26ViliamF35000000470000000---2.386--10.677%


Trial Factoring results:
Exponent "1864739" not found


ECM factoring results:

Old Calculation Method

Total ECM effort:19.785 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:19.785 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.8080.015%
25500000.79845.029%
302500000.04995.184%
3510000000.00299.773%


ECM Summary

B1B2factorcurvesGHz-days
500005000000402.769
50000660000021817.02


Lucas-Lehmer results:
Exponent "1864739" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T09:49:39Oliver KruseGTX-0
865238897
782521855299947974696932851410613860657
29AC41C76D948240no
2017-10-05T21:07:35Oliver KruseManual testing
865238897
782521855299947974696932851410613860657
29AC41C76D9482__no
2017-11-11T04:53:21kkmrkkblmbrbkc4.xlarge
865238897
782521855299947974696932851410613860657
29AC41C76D9482__no


P-1 factor-bounds graph:
B1 = 5000000, B2 = 470000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
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107
100
101
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109
TF factor-bounds graph:
267
220
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240
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2130
Last modified: 2021-08-20T12:36:41+00:00