is 2 1500619 - 1
has 451732 decimal digits
takes 0.067 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1009008C9429528Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26979.558469.5652%100000003016244191.67678.8912%81.235172.2712%2.7060%
PrimeNet2570.012863.1579%65001000000.00082.3406%0.013564.0202%0.8623%
GPU722610.204765.5738%6000500000.00050.9480%0.205265.9001%0.3264%
Difference+8+79.3537+3.9914%+9994000+301574419+1.6762+7.9432%+81.0298+6.3711%+6.3711%

Known prime factors (1 factor, 85.0 bits, 0.00566612% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1500619394136180070046099173414312685.02713132453343255219985
3 × 5 × 11 × 991 × 80313447348899
2019-12-29991803134473488995,408,157283,399529,311

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-17T13:59:00BigBrotherMiniluv2000005000000---0.030--2.812%
2015-01-06T12:14:00VictordeHollanderManual testing10000000200000000---1.318--8.356%
2018-11-20T16:48:47Jocelyn LaroucheManual testing1000000030162441912---1.677--8.891%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-10-11T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-06-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2016-02-23T16:28:35Mark RoseManual testing258261--0.179--
2016-02-23T16:28:35Mark RoseManual testing261262--0.205--
2010-02-19T05:45:00GrunwalderGIMPManual testing21263--1.064--
2016-02-23T16:28:35Mark RoseManual testing262263--0.654--
2015-01-04T23:03:00snme2pm1Manual testing263264--1.308--
2015-01-04T23:03:00snme2pm1Manual testing264265--2.490--
2015-09-26T12:42:11ramgeisManual testing265266--4.980--
2018-04-02T12:17:09TJAOIManual testing266267--9.96--
2018-06-06T17:06:38ramgeisManual testing267268--19.92--
2019-10-10T18:48:48mnd9Manual testing268269--39.84--


ECM factoring results:

Old Calculation Method

Total ECM effort:29.191 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000324 / 1003.2403.853%
2550000324 / 2801.15731.373%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:29.191 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100012.6990.000%
25500001.36025.654%
302500000.10989.647%
3510000000.00799.284%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028015.60
25000025000000133.622
25000035000000319.97


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-10-25T00:00:00ANONYMOUSv4_computers1009008C9429528A0.067
2015-07-03T04:32:00MadPooManual testing1009008C9429528A0.067


PRP results:
dateuseridcompidcofactorsres64PRP
2019-12-29T15:13:37Christoph ZengerManual testing
39413618007004609917341431
D22927301B1CDA58no
2019-12-30T05:41:09Niels_Mache_NextcloudSuperDry-X
39413618007004609917341431
D22927301B1CDA58no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 301624419 (P-1 stage 2)
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-10T10:39:15+00:00