is 2 6916633 - 1
has 2082115 decimal digits
takes 1.508 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA02B412F61402A94double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272138.265868.0556%40000004568186709.06528.0778%147.330970.6360%2.5804%
PrimeNet2630.230863.4921%280007000000.02043.1598%0.251264.6456%1.1536%
GPU722674.296065.6716%450009000000.02902.2361%4.325066.4393%0.7676%
Difference+5+133.9698+2.3839%+3955000+455918670+9.0362+5.8417%+143.0060+4.1967%+1.8128%

Known prime factors:
No known factors for M6916633

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-31T00:00:00foxkidv4_computers3000030000---0.009--0.234%
2011-09-03T20:12:00Carsten Kossendeymother44000013310000---0.361--3.504%
2021-11-12T04:53:05Seth_TrManual testing30000007500000012---2.189--5.981%
2021-12-02T03:38:28Seth_TrManual testing4000000456818670---9.065--8.078%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11T00:00:00ANONYMOUSv4_computers21262--0.089--
2005-02-12T00:00:00ANONYMOUSv4_computers21263--0.231--
2014-02-09T10:09:00NesowaManual testing263264--0.284--
2014-02-17T19:28:00lycornManual testing264265--0.540--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.080--
2016-04-02T19:15:59Gordon SpenceManual testing266267--2.161--
2018-02-27T00:21:34-Anonymous-Manual testing267268--4.322--
2020-05-15T09:09:06TJAOIManual testing268269--8.643--
2021-07-18T04:15:01takahashiManual testing269270--17.29--
2021-08-10T15:20:46SRBaseManual testing270271--34.57--
2021-09-28T15:07:35SRBaseManual testing271272--69.15--


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)
1999-10-15T00:00:00TMarshallv4_computersA02B412F61402A941.508
2001-10-06T00:00:00foxkidv4_computersA02B412F61402A941.508


PRP results:
No PRP results for M6916633


P-1 factor-bounds graph:
B1 = 4000000, B2 = 456818670 (P-1 stage 2)
B1 = 3000000, B2 = 75000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 3000000 (P-1 stage 1)
B1 = 440000, B2 = 13310000 (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: 2021-12-02T03:38:28+00:00