is 2 6979361 - 1
has 2100998 decimal digits
takes 1.522 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0DE4E5B9757EA140double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.023168.0556%3000000750000002.18885.9868%139.211969.9680%1.9125%
PrimeNet2630.228763.4921%300008000000.02273.3120%0.251464.7012%1.2091%
GPU722674.257465.6716%450009000000.02902.2394%4.286466.4404%0.7688%
Difference+5+132.7657+2.3839%+2955000+74100000+2.1599+3.7474%+134.9256+3.5276%+1.1437%

Known prime factors:
No known factors for M6979361

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-16T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.235%
2011-09-07T05:29:00Carsten Kossendeymother44000013530000---0.365--3.520%
2021-11-18T09:19:59Seth_TrManual testing30000007500000012---2.189--5.987%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-21T00:00:00Baquarav4_computers21262--0.088--
2005-08-16T00:00:00ANONYMOUSv4_computers21263--0.229--
2014-02-09T10:18:00NesowaManual testing263264--0.281--
2014-02-15T15:54:00lycornManual testing264265--0.535--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.071--
2016-04-26T14:24:12Gordon SpenceManual testing266267--2.141--
2018-02-27T00:22:03-Anonymous-Manual testing267268--4.283--
2020-04-10T07:57:04TJAOIManual testing268269--8.566--
2021-08-09T10:19:08takahashiManual testing269270--17.13--
2021-09-08T15:11:19SRBaseManual testing270271--34.26--
2021-09-28T15:05:44SRBaseManual testing271272--68.52--


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)
1999-05-02T00:00:00ANONYMOUSv4_computers0DE4E5B9757EA1401.522
2000-01-12T00:00:00ANONYMOUSv4_computers0DE4E5B9757EA1401.522
2001-10-25T00:00:00ANONYMOUSv4_computers0DE4E5B9757EA1401.522


PRP results:
No PRP results for M6979361


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: 2021-11-18T09:19:59+00:00