is 2 1529989 - 1
has 460573 decimal digits
takes 0.068 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L99AA1373EA6A1469double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26719.421068.6567%945000274050000.15465.9394%19.575670.5183%1.8616%
PrimeNet2570.012563.1579%65001100000.00082.4142%0.013364.0474%0.8895%
GPU722610.200865.5738%6500550000.00061.0142%0.201465.9229%0.3491%
Difference+6+19.2202+3.0829%+938500+27350000+0.1540+4.9252%+19.3742+4.5954%+4.5954%

Known prime factors (2 factors, 162.4 bits, 0.01061629% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
152998928611864901622419013272271.277935034987232667
935034987232667
2019-07-051935034987232667323.773,299,4276,162,410
152998927488822801935844137329338812891.151898334001157388848460
22 × 5 × 44916700057869442423
2014-02-18544916700057869442423444,123,5431.585e+112.960e+11

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1529989786506484313626219690994717729177149245141716008749162.428
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000285000---0.002--0.986%
2011-01-31T08:15:00James HeinrichWHS800001340000---0.010--2.193%
2013-11-19T04:09:00David Campeaui5-2500k94500027405000---0.155--5.939%
2016-03-17T19:15:57alpertronManual testing5000001500000012---0.084--4.960%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-18T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-08-08T00:00:00ANONYMOUSv4_computers21258--0.025--
2010-04-26T11:30:00Architects Cubeda3_bu2260261--0.100--
2010-07-24T22:47:00GrunwalderGIMPManual testing21263--1.043--


ECM factoring results:

Old Calculation Method

Total ECM effort:13.900 GHz-days
Estimated T-Level:24.446
DigitsB1CurvesCompleteFacMiss
2011000249 / 1002.4908.188%
2550000249 / 2800.88941.030%

New Calculation Method

Total ECM effort:13.900 GHz-days
Estimated T-Level:24.446
DigitsB1CompleteFacMiss
20110008.0320.032%
25500000.72648.387%
302500000.04595.628%
3510000000.00299.796%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000020911.67
500005000000402.233


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-10-29T00:00:00ANONYMOUSv4_computers99AA1373EA6A14690.068


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T15:00:47Oliver KruseGTX-2
2748882280193584413732933881
0694A86560D554__no
2017-10-30T02:58:30kkmrkkblmbrbkc4.xlarge
2748882280193584413732933881
0694A86560D554__no
2019-07-05T12:11:56ATHec2-PRPCF
2861186490162241901327
2748882280193584413732933881
A7F9D28F9719D8F9no
2019-07-07T14:13:51arnaudstm-11-010
2861186490162241901327
2748882280193584413732933881
A7F9D28F9719D8F9no


P-1 factor-bounds graph:
B1 = 945000, B2 = 27405000 (P-1 stage 2)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 945000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 80000, B2 = 1340000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 20000, B2 = 285000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-07-07T14:13:51+00:00