is 2 6994487 - 1
has 2105551 decimal digits
takes 1.525 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0D7845479D52BBEAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272136.726868.0556%20000002416186504.76016.9171%141.486970.2652%2.2096%
PrimeNet2630.228263.4921%300008000000.02273.3131%0.250964.7016%1.2096%
GPU722674.248265.6716%450009000000.02902.2402%4.277166.4407%0.7690%
Difference+5+132.4786+2.3839%+1955000+240718650+4.7312+4.6769%+137.2098+3.8245%+1.4406%

Known prime factors:
No known factors for M6994487

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-30T00:00:00BJBv4_computers3000030000---0.009--0.235%
2011-09-08T12:13:00Carsten Kossendeymother44500013683750---0.369--3.535%
2021-11-05T16:07:24Seth_TrManual testing20000005800000012---1.597--5.524%
2021-12-06T07:22:17Seth_TrManual testing2000000241618650---4.760--6.917%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-21T00:00:00Phantomasv4_computers21262--0.088--
2005-09-22T00:00:00ANONYMOUSv4_computers21263--0.228--
2014-02-09T10:18:00NesowaManual testing263264--0.281--
2014-02-14T08:55:00lycornManual testing264265--0.534--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.068--
2016-04-28T01:09:02Gordon SpenceManual testing266267--2.137--
2018-02-27T00:22:02-Anonymous-Manual testing267268--4.274--
2020-04-03T12:20:55TJAOIManual testing268269--8.547--
2020-07-26T22:52:15takahashiManual testing269270--17.09--
2020-09-20T07:15:29takahashiManual testing270271--34.19--
2021-09-25T07:01:39SRBaseManual testing271272--68.38--


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)
1999-07-26T00:00:00ANONYMOUSv4_computers0D7845479D52BBEA1.525
2002-01-08T00:00:00BJBv4_computers0D7845479D52BBEA1.525


PRP results:
No PRP results for M6994487


P-1 factor-bounds graph:
B1 = 2000000, B2 = 241618650 (P-1 stage 2)
B1 = 2000000, B2 = 58000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 445000, B2 = 13683750 (P-1 stage 2)
B1 = 445000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-06T07:22:17+00:00