is 2 2924839 - 1
has 880465 decimal digits
takes 0.226 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0901A221C1B2E4E9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26940.818268.1159%1000000200000000.22795.0506%41.046269.7263%1.6103%
PrimeNet2590.026362.7119%130002600000.00303.0690%0.029263.8562%1.1444%
GPU722630.545765.0794%170003000000.00361.9445%0.549365.7584%0.6790%
Difference+6+40.2726+3.0366%+983000+19700000+0.2243+3.1061%+40.4969+3.9679%+3.9679%

Known prime factors:
No known factors for M2924839

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.198%
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.120%
2010-11-13T06:18:00markrtiny1050002283750---0.025--2.294%
2015-04-27T09:55:00VictordeHollanderManual testing100000020000000---0.228--5.051%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:24Mark RoseManual testing21260--0.053--
2009-02-13T23:56:00Sturle Sundehaydn.ifi260261--0.053--
2012-01-09T20:20:00Grant McCrackenthumper261262--0.105--
2013-01-10T21:10:00dbaughManual testing262263--0.336--
2015-04-25T17:16:00VictordeHollanderManual testing263264--0.671--
2015-04-25T17:16:00VictordeHollanderManual testing264265--1.277--
2016-02-23T09:49:03ramgeisManual testing265266--2.555--
2017-11-22T00:30:13Gordon SpenceManual testing266267--5.110--
2018-12-20T02:16:12chuenkitManual testing267268--10.22--
2021-05-31T09:33:04TJAOIManual testing268269--20.44--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.935 GHz-days
Estimated T-Level:21.946
DigitsB1CurvesCompleteFacMiss
2011000109 / 1001.09033.438%
2550000109 / 2800.38967.707%

New Calculation Method

Total ECM effort:11.935 GHz-days
Estimated T-Level:21.946
DigitsB1CompleteFacMiss
20110004.2931.367%
25500000.39767.236%
302500000.02597.521%
3510000000.00199.883%


ECM Summary

B1B2factorcurvesGHz-days
500005000000747.765
50000585000070.789
50000645000070.828
50000665000070.840
50000675000070.847
50000705000070.866


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-16T00:00:00ANONYMOUSv4_computers0901A221C1B2E4E90.226
2018-10-06T00:01:56kkmrkkblmbrbkold0901A221C1B2E4E90.226


PRP results:
No PRP results for M2924839


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 2283750 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-12T11:38:40+00:00