is 2 2321587 - 1
has 698868 decimal digits
takes 0.157 GHz-days to do one PRP test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.799067.1642%50000005000000003.131510.9657%15.930578.1298%16.0609%
PrimeNet2580.016562.0690%100001900000.00192.9330%0.018565.0020%2.9330%
GPU722620.264664.5161%130002000000.00231.7822%0.266966.2984%1.7822%
Difference+5+12.5343+2.6481%+4987000+499800000+3.1293+9.1834%+15.6636+11.8315%+11.8315%

Known prime factors (2 factors, 106.2 bits, 0.00457419% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2321587398894521159131445.1818590988
22 × 7 × 306821
-73068213.071e-60.00160.0031
232158723264061453171174731961.013501037898928
24 × 3 × 7 × 172 × 61 × 251 × 337
2016-03-232893370.22132.857e-55.761e-5

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
23215879279906653579289773973783364784932106.194
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2018-03-05T12:08:16alpertronManual testing5000001500000012---0.126--5.216%
2021-04-22T05:44:07ViliamF35000000500000000---3.132--10.966%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-03-23T12:24:17TJAOIManual testing26126261.013190.0890.3190.181


ECM factoring results:
Total ECM effort:0.532 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

ECM Summary

B1B2factorcurvesGHz-days
50000500000060.532


Lucas-Lehmer results:
Exponent "2321587" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-11T19:32:39Oliver KruseGTX-2
39889452115913
2326406145317117473
CE5BEEA5FECF8B__no
2017-11-23T07:25:14ATHec2-1xf
39889452115913
2326406145317117473
CE5BEEA5FECF8B__no


P-1 factor-bounds graph:
B1 = 5000000, B2 = 500000000 (stage 2)
B1 = 5000000 (stage 1)
B1 = 500000, B2 = 15000000 (stage 2)
B1 = 500000 (stage 1)
100
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103
104
105
106
107
100
101
102
103
104
105
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109
TF factor-bounds graph:
267
262
240
250
260
270
280
290
2100
Last modified: 2021-04-22T05:44:07+00:00