is 2 6973801 - 1
has 2099324 decimal digits
takes 1.521 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L4C69CDFA483420B8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.132368.0556%3000000750000002.18885.9864%139.321269.9679%1.9123%
PrimeNet2630.228963.4921%280007000000.02043.1640%0.249364.6472%1.1551%
GPU722674.260865.6716%450009000000.02902.2391%4.289766.4403%0.7687%
Difference+5+132.8715+2.3839%+2955000+74100000+2.1599+3.7472%+135.0314+3.5276%+1.1436%

Known prime factors:
No known factors for M6973801

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-16T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.234%
2011-05-10T08:22:00Carsten Kossendeyleela44000013530000---0.365--3.519%
2021-11-17T18:26:31Seth_TrManual testing30000007500000012---2.189--5.986%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-21T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-12-21T00:00:00ANONYMOUSv4_computers21262--0.088--
1999-01-17T00:00:00ANONYMOUSv4_computers21262--0.088--
2005-08-01T00:00:00ANONYMOUSv4_computers21263--0.229--
2014-02-09T10:18:00NesowaManual testing263264--0.282--
2014-02-15T00:06:00lycornManual testing264265--0.536--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.072--
2016-04-26T14:24:09Gordon SpenceManual testing266267--2.143--
2018-02-25T11:47:56-Anonymous-Manual testing267268--4.286--
2020-04-24T07:20:55TJAOIManual testing268269--8.572--
2021-08-07T09:00:26takahashiManual testing269270--17.14--
2021-09-06T18:09:54SRBaseManual testing270271--34.29--
2021-09-25T07:19:01SRBaseManual testing271272--68.58--


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)
1999-03-26T00:00:00ANONYMOUSv4_computers4C69CDFA483420B81.521
2001-12-22T00:00:00ANONYMOUSv4_computers4C69CDFA483420B81.521


PRP results:
No PRP results for M6973801


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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TF factor-bounds graph:
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Last modified: 2021-11-17T18:26:31+00:00