is 2 6968047 - 1
has 2097592 decimal digits
takes 1.519 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L991C99CE306A0AFDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.245668.0556%3000000750000002.18885.9858%139.434469.9677%1.9121%
PrimeNet2630.229063.4921%280007000000.02043.1636%0.249564.6470%1.1550%
GPU722674.264365.6716%450009000000.02902.2388%4.293366.4402%0.7686%
Difference+5+132.9813+2.3839%+2955000+74100000+2.1599+3.7470%+135.1412+3.5275%+1.1436%

Known prime factors:
No known factors for M6968047

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-24T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.234%
2011-09-06T05:37:00Carsten Kossendeymother44000013530000---0.365--3.519%
2021-11-09T14:59:19Seth_TrManual testing30000007500000012---2.189--5.986%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-02T00:00:00ANONYMOUSv4_computers21262--0.088--
2005-08-01T00:00:00ANONYMOUSv4_computers21263--0.229--
2014-02-09T10:18:00NesowaManual testing263264--0.282--
2014-02-15T15:55:00lycornManual testing264265--0.536--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.072--
2016-04-25T00:49:45Gordon SpenceManual testing266267--2.145--
2018-02-27T00:22:00-Anonymous-Manual testing267268--4.290--
2020-04-24T07:20:56TJAOIManual testing268269--8.579--
2021-08-07T09:00:09takahashiManual testing269270--17.16--
2021-09-07T19:08:42SRBaseManual testing270271--34.32--
2021-09-25T07:08:51SRBaseManual testing271272--68.64--


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)
1999-04-02T00:00:00ANONYMOUSv4_computers991C99CE306A0AFD1.519
2002-05-18T00:00:00ANONYMOUSv4_computers991C99CE306A0AFD1.519


PRP results:
No PRP results for M6968047


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 = 30000 (P-1 stage 1)
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108
TF factor-bounds graph:
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Last modified: 2021-11-09T14:59:19+00:00