is 2 2937269 - 1
has 884207 decimal digits
takes 0.250 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9237C0FB61EE4D5Adouble-checked
PRP1B030EB147AD742Dverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26820.292667.6471%1000000200000000.25125.5410%20.543869.4397%1.7927%
PrimeNet2590.026162.7119%130002600000.00333.0713%0.029463.8571%1.1452%
GPU722630.543465.0794%170003000000.00401.9460%0.547465.7589%0.6796%
Difference+5+19.7493+2.5677%+983000+19700000+0.2472+3.5950%+19.9964+3.6808%+3.6808%

Known prime factors (1 factor, 78.3 bits, 0.00266404% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
29372693594504994989173372830332478.25061187875454872764
22 × 34 × 13 × 89 × 163225123123
2020-12-118916322512312322,8441,097.52,049.8

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.246%
2010-11-08T03:20:00markrtiny1050002283750---0.028--2.585%
2015-04-29T15:00:00VictordeHollanderManual testing100000020000000---0.251--5.541%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:25Mark RoseManual testing21260--0.052--
2009-02-13T23:25:00Sturle Sundekinner.ifi260261--0.052--
2012-01-01T00:37:00markroldgamer261262--0.105--
2013-01-07T13:49:00dbaughManual testing262263--0.334--
2015-04-25T17:16:00VictordeHollanderManual testing263264--0.668--
2015-04-25T17:16:00VictordeHollanderManual testing264265--1.272--
2016-02-23T16:36:50ramgeisManual testing265266--2.544--
2017-11-24T17:10:13Gordon SpenceManual testing266267--5.088--
2018-12-22T00:20:03chuenkitManual testing267268--10.18--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.092 GHz-days
Estimated T-Level:2.200
DigitsB1CurvesCompleteFacMiss
201100044 / 1000.44064.261%
255000044 / 2800.15785.434%

New Calculation Method

Total ECM effort:5.092 GHz-days
Estimated T-Level:2.200
DigitsB1CompleteFacMiss
20110001.41924.187%
25500000.12887.961%
302500000.00899.213%


ECM Summary

B1B2factorcurvesGHz-days
500005000000394.513
50000500000050.579


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23T00:00:00ANONYMOUSv4_computers9237C0FB61EE4D5A0.250
2018-10-09T11:12:32kkmrkkblmbrbkold9237C0FB61EE4D5A0.250


PRP results:
dateuseridcompidcofactorsres64PRP
2020-12-11T16:13:12mrhw
359450499498917337283033
1B030EB147AD742Dno


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 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-12-11T16:13:12+00:00