is 2 3397939 - 1
has 1022882 decimal digits
takes 0.357 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L3BF99A5A9A1010B7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26817.541567.6471%23000067275000.08893.8186%17.630471.4657%8.1324%
PrimeNet2600.045263.3333%140002800000.00432.8469%0.049566.1802%2.8469%
GPU722641.047565.6250%190003200000.00541.8190%1.052967.4440%1.8190%
Difference+4+16.4940+2.0221%+211000+6407500+0.0835+1.9996%+16.5775+4.0217%+4.0217%

Known prime factors:
No known factors for M3,397,939

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-11T19:28:00Carsten Kossendeydurandal15000206250---0.004--0.812%
2011-10-25T01:09:00harleeP4_260060000945000---0.016--1.890%
2012-12-09T22:41:00Squeeky_SquirrelP4_26002300006727500---0.089--3.819%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:28Mark RoseManual testing21260--0.045--
2009-03-25T05:53:00S485122USB-A260261--0.045--
2011-08-17T21:56:00Grant McCrackenhome261262--0.090--
2012-11-02T08:22:00lycornManual testing262264--0.867--
2013-10-19T21:12:00David CampeauManual testing264265--1.100--
2015-04-05T13:46:00Gordon SpenceManual testing265266--2.199--
2017-03-12T14:28:49Gordon SpenceManual testing266267--4.398--
2018-08-27T12:38:17TJAOIManual testing267268--8.797--


ECM factoring results:
Total ECM effort:4.251 GHz-days
Estimated T-Level:1.450
DigitsB1CurvesCompleteFacMiss
201100029 / 1000.29074.717%
255000029 / 2800.10490.144%

ECM Summary

B1B2factorcurvesGHz-days
500005000000294.251


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-30T00:00:00ANONYMOUSv4_computers3BF99A5A9A1010B70.357


PRP results:
Exponent "3397939" not found


P-1 factor-bounds graph:
B1 = 230000, B2 = 6727500 (stage 2)
B1 = 230000 (stage 1)
B1 = 60000, B2 = 945000 (stage 2)
B1 = 60000 (stage 1)
B1 = 15000, B2 = 206250 (stage 2)
B1 = 15000 (stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2021-04-06T23:42:25+00:00