is 2 1905443 - 1
has 573596 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-LEA10457A52E4C969double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26831.281469.1176%80000003200000001.96659.7332%33.247872.1235%3.0058%
PrimeNet2570.010163.1579%90001600000.00143.0396%0.011464.2778%1.1199%
GPU722610.161265.5738%100001600000.00141.7283%0.162666.1688%0.5950%
Difference+7+31.1202+3.5439%+7990000+319840000+1.9650+8.0048%+33.0852+5.9547%+5.9547%

Known prime factors:
No known factors for M1905443

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-05-31T22:44:00kurlyslice100000030000000---0.203--5.681%
2017-11-27T13:23:31mikrS061800000032000000012---1.966--9.733%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-04-14T00:00:00GrunwalderGIMPv4_computers21256--0.005--
2011-04-14T00:00:00GrunwalderGIMPv4_computers256257--0.005--
2002-01-02T00:00:00Jocelyn Larouchev4_computers21258--0.020--
2011-04-14T00:00:00GrunwalderGIMPv4_computers257258--0.010--
2011-04-14T00:00:00GrunwalderGIMPv4_computers258259--0.020--
2011-04-14T00:00:00GrunwalderGIMPv4_computers259260--0.040--
2011-04-14T00:00:00GrunwalderGIMPv4_computers260261--0.081--
2009-05-25T12:46:00Architects Cubedi4l_1260261--0.081--
2011-02-07T07:13:00GrunwalderGIMPGWPrime02261262--0.161--
2011-02-07T07:13:00GrunwalderGIMPGWPrime02262263--0.515--
2015-05-17T05:14:00omylistManual testing263264--1.030--
2015-05-19T06:11:00omylistManual testing264265--1.961--
2015-08-31T08:30:00ramgeisManual testing265266--3.922--
2017-03-15T08:26:27Smok_bmvManual testing266267--7.844--
2019-04-26T04:32:10chuenkitManual testing267268--15.69--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.833 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:17.833 GHz-days
Estimated T-Level:24.464
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)
1998-12-21T00:00:00ANONYMOUSv4_computersEA10457A52E4C9690.103
2015-07-14T15:04:00MadPooManual testingEA10457A52E4C9690.103


PRP results:
No PRP results for M1905443


P-1 factor-bounds graph:
B1 = 8000000, B2 = 320000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
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109
TF factor-bounds graph:
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Last modified: 2022-01-18T14:07:40+00:00