is 2 6970841 - 1
has 2098433 decimal digits
takes 1.520 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDE4CF8496D1BDE85double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.190668.0556%3000000750000002.18885.9861%139.379469.9678%1.9122%
PrimeNet2630.229063.4921%280007000000.02043.1638%0.249464.6471%1.1550%
GPU722674.262665.6716%450009000000.02902.2390%4.291666.4403%0.7686%
Difference+5+132.9280+2.3839%+2955000+74100000+2.1599+3.7471%+135.0879+3.5275%+1.1436%

Known prime factors:
No known factors for M6970841

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00ANONYMOUSv4_computers2500087500---0.009--0.431%
2011-09-06T13:17:00Carsten Kossendeymother44000013530000---0.365--3.519%
2021-11-12T17:16:31Seth_TrManual testing30000007500000012---2.189--5.986%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-21T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-10-04T00:00:00ANONYMOUSv4_computers21262--0.088--
2005-08-01T00:00:00ANONYMOUSv4_computers21263--0.229--
2014-02-09T10:18:00NesowaManual testing263264--0.282--
2014-02-14T23:09:00lycornManual testing264265--0.536--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.072--
2016-04-26T14:24:08Gordon SpenceManual testing266267--2.144--
2018-02-27T00:22:02-Anonymous-Manual testing267268--4.288--
2020-04-24T07:20:55TJAOIManual testing268269--8.576--
2021-08-07T09:00:18takahashiManual testing269270--17.15--
2021-09-07T19:35:11SRBaseManual testing270271--34.30--
2021-09-25T07:12:44SRBaseManual testing271272--68.61--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13T00:00:00ANONYMOUSv4_computersDE4CF8496D1BDE851.520
2003-01-16T00:00:00ANONYMOUSv4_computersDE4CF8496D1BDE851.520


PRP results:
No PRP results for M6970841


P-1 factor-bounds graph:
B1 = 3000000, B2 = 75000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 440000, B2 = 13530000 (P-1 stage 2)
B1 = 440000 (P-1 stage 1)
B1 = 25000, B2 = 87500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-12T17:16:31+00:00