is 2 1813699 - 1
has 545978 decimal digits
takes 0.098 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP6619340A9B6CFD75verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26832.863769.1176%18136991813699000.91227.9847%33.775971.5835%2.4659%
PrimeNet2570.010663.1579%80001500000.00122.8743%0.011864.2168%1.0589%
GPU722610.169465.5738%90001300000.00121.5568%0.170666.1097%0.5359%
Difference+7+32.6943+3.5439%+1804699+181239900+0.9110+6.4279%+33.6053+5.4738%+5.4738%

Known prime factors (1 factor, 82.4 bits, 0.00454389% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
181369964363353048325580079590472582.4131774366999384285377
33 × 40129 × 1637650982419
2020-09-08401291637650982419890,3627,018.613,109

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-09T16:51:00Carsten Kossendeyleela1000001650000---0.015--2.198%
2014-05-13T21:10:00Jocelyn LaroucheManual testing135389135389---0.011--0.924%
2014-09-22T21:00:00Jocelyn LaroucheManual testing170778170778---0.013--1.050%
2015-05-20T06:14:00mikrMSI278000091760000---0.600--7.483%
2018-09-21T11:45:47Jocelyn Larouchelow 4M181369918136990012---0.912--7.985%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers21258--0.021--
2016-02-23T16:28:53Mark RoseManual testing258260--0.064--
2010-04-17T14:28:00Architects Cubeda3_bu2260261--0.085--
2016-02-23T16:28:53Mark RoseManual testing261262--0.169--
2011-01-21T16:10:00GrunwalderGIMPManual testing21263--0.880--
2016-02-23T16:28:53Mark RoseManual testing262263--0.541--
2015-04-22T21:30:00snme2pm1Manual testing263264--1.082--
2015-04-22T21:30:00snme2pm1Manual testing264265--2.060--
2015-09-02T13:37:00ramgeisManual testing265266--4.120--
2018-04-02T12:17:07TJAOIManual testing266267--8.240--
2019-07-01T11:11:04TJAOIManual testing267268--16.48--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.993 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.993 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.2790.025%
25500000.74947.286%
302500000.04695.485%
3510000000.00299.788%


ECM Summary

B1B2factorcurvesGHz-days
50000500000016211.18
50000500000070.483
500006500000826.332


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-07-18T18:31:00MadPooManual testing3A7829B2E485F9__0.098


PRP results:
dateuseridcompidcofactorsres64PRP
2020-09-09T11:16:51ViliamFAWS
6436335304832558007959047
6619340A9B6CFD75no


P-1 factor-bounds graph:
B1 = 1813699, B2 = 181369900 (P-1 stage 2)
B1 = 2780000, B2 = 91760000 (P-1 stage 2)
B1 = 2780000 (P-1 stage 1)
B1 = 1813699 (P-1 stage 1)
B1 = 100000, B2 = 1650000 (P-1 stage 2)
B1 = 170778 (P-1 stage 1)
B1 = 135389 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-03-05T18:09:06+00:00