is 2 1903073 - 1
has 572883 decimal digits
takes 0.103 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LFABBE195716AFA34double-checked
PRP1ABDD1C059CF1111PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26831.320369.1176%80000003200000001.96659.7321%33.286872.1231%3.0055%
PrimeNet2570.010163.1579%90001600000.00143.0389%0.011464.2775%1.1196%
GPU722610.161465.5738%100001600000.00141.7279%0.162866.1686%0.5949%
Difference+7+31.1589+3.5439%+7990000+319840000+1.9650+8.0042%+33.1239+5.9545%+2.4106%

Known prime factors (1 factor, 79.6 bits, 0.00418036% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19030738882794243050135407616232479.555233380281341024107
17321 × 13473834151667
2022-08-08173211347383415166769,44557,745107,852

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-08-10T00:00:00Jocelyn Larouchev4_computers20000160000---0.002--0.732%
2011-02-09T16:50:00Carsten Kossendeyleela1050001785000---0.015--2.280%
2011-06-27T22:28:00kurlykk100000030000000---0.203--5.680%
2017-11-24T15:01:27mikrS068800000032000000012---1.966--9.732%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-08T13:33:08masserManual testing15000005400000027P+12479.5550.400


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-02-05T00:00:00GrunwalderGIMPv4_computers21256--0.005--
2011-02-05T00:00:00GrunwalderGIMPv4_computers256257--0.005--
2002-01-02T00:00:00Jocelyn Larouchev4_computers21258--0.020--
2011-02-05T00:00:00GrunwalderGIMPv4_computers257258--0.010--
2011-02-05T00:00:00GrunwalderGIMPv4_computers258259--0.020--
2011-02-05T00:00:00GrunwalderGIMPv4_computers259260--0.040--
2011-02-05T00:00:00GrunwalderGIMPv4_computers260261--0.081--
2009-05-24T10:15:00Architects Cubedm1_fw260261--0.081--
2011-01-22T06:14:00GrunwalderGIMPGWPrime02261262--0.161--
2011-01-22T10:11:00GrunwalderGIMPGWPrime02262263--0.516--
2015-05-16T12:25:00omylistManual testing263264--1.032--
2015-05-16T17:55:00monstManual testing264265--1.963--
2015-08-31T08:30:00ramgeisManual testing265266--3.927--
2017-03-15T08:26:26Smok_bmvManual testing266267--7.853--
2019-04-25T20:32:09chuenkitManual testing267268--15.71--


ECM factoring results:
Total ECM effort:17.831 GHz-days
Estimated T-Level:24.523
DigitsB1CompleteFacMiss
20110009.7880.006%
25500000.90540.474%
302500000.05794.445%
3510000000.00399.733%


ECM Summary

B1B2factorcurvesGHz-days
50000500000019613.60
500006600000473.679
50000675000070.554


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computers18DC6A61809E88__0.103
1999-03-15T00:00:00Smegheadsv4_computersFABBE195716AFA340.103
2015-07-14T15:04:00MadPooManual testingFABBE195716AFA340.103


PRP results:
dateuseridcompidcofactorsres64PRP
2022-08-10T07:07:53LordJuliusWhiteBox
888279424305013540761623
1ABDD1C059CF1111no


P-1 factor-bounds graph:
B1 = 8000000, B2 = 320000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1500000, B2 = 54000000 (P+1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1500000 (P+1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 1785000 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 20000, B2 = 160000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-08-10T07:07:53+00:00