is 2 2944153 - 1
has 886279 decimal digits
takes 0.251 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5062B8E40164A4CDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26940.550568.1159%1000000200000000.25125.0544%40.801669.7275%1.6116%
PrimeNet2590.026162.7119%130002600000.00333.0725%0.029363.8576%1.1457%
GPU722630.542165.0794%170003000000.00401.9469%0.546165.7592%0.6799%
Difference+6+40.0084+3.0366%+983000+19700000+0.2472+3.1076%+40.2555+3.9683%+3.9683%

Known prime factors:
No known factors for M2944153

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.199%
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.120%
2010-11-05T16:06:00markrtiny1050002310000---0.028--2.302%
2015-04-30T21:53:00VictordeHollanderManual testing100000020000000---0.251--5.054%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:25Mark RoseManual testing21260--0.052--
2009-02-12T23:24:00Sturle Sundewright.ifi260261--0.052--
2011-12-24T17:56:00markroldgamer261262--0.104--
2013-01-07T13:49:00dbaughManual testing262263--0.333--
2015-04-27T09:54:00VictordeHollanderManual testing263264--0.667--
2015-04-27T09:54:00VictordeHollanderManual testing264265--1.269--
2016-02-24T09:33:38ramgeisManual testing265266--2.538--
2017-11-28T10:01:34Gordon SpenceManual testing266267--5.076--
2018-12-24T00:53:30chuenkitManual testing267268--10.15--
2021-05-19T10:49:32TJAOIManual testing268269--20.31--


ECM factoring results:

Old Calculation Method

Total ECM effort:12.788 GHz-days
Estimated T-Level:21.946
DigitsB1CurvesCompleteFacMiss
2011000109 / 1001.09033.438%
2550000109 / 2800.38967.707%

New Calculation Method

Total ECM effort:12.788 GHz-days
Estimated T-Level:21.946
DigitsB1CompleteFacMiss
20110004.2261.462%
25500000.39167.656%
302500000.02597.563%
3510000000.00199.885%


ECM Summary

B1B2factorcurvesGHz-days
5000050000009511.00
50000575000070.863
50000665000070.927


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-09T00:00:00Smegheadsv4_computers5062B8E40164A4CD0.251
2018-10-11T06:35:45kkmrkkblmbrbkold5062B8E40164A4CD0.251


PRP results:
No PRP results for M2944153


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 105000, B2 = 2310000 (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: 2022-04-24T00:39:36+00:00