is 2 6952571 - 1
has 2092933 decimal digits
takes 1.516 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD143D69C68D10C67double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.551168.0556%40000004568186709.06528.0818%146.616270.6372%2.5817%
PrimeNet2630.229663.4921%280007000000.02043.1624%0.250064.6466%1.1545%
GPU722674.273865.6716%450009000000.02902.2380%4.302866.4399%0.7683%
Difference+5+133.2773+2.3839%+3955000+455918670+9.0362+5.8437%+142.3135+4.1973%+1.8134%

Known prime factors:
No known factors for M6952571

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-10T00:00:00ANONYMOUSv4_computers2500087500---0.009--0.431%
2011-06-21T11:43:00Carsten Kossendeyleela44500013350000---0.363--3.515%
2021-11-07T02:26:13Seth_TrManual testing20000005800000012---1.597--5.521%
2021-12-03T20:44:24Seth_TrManual testing4000000456818670---9.065--8.082%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-09-06T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-09-13T00:00:00ANONYMOUSv4_computers21262--0.088--
2004-03-26T00:00:00Sturle Sundev4_computers21263--0.230--
2014-02-09T10:12:00NesowaManual testing263264--0.282--
2014-02-16T01:22:00lycornManual testing264265--0.537--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.075--
2016-04-05T22:46:27Gordon SpenceManual testing266267--2.150--
2018-02-27T00:21:58-Anonymous-Manual testing267268--4.299--
2020-05-01T08:51:03TJAOIManual testing268269--8.599--
2021-07-31T07:00:45takahashiManual testing269270--17.20--
2021-08-12T16:41:33SRBaseManual testing270271--34.39--
2021-09-25T07:07:05SRBaseManual testing271272--68.79--


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_computersD143D69C68D10C671.516
2001-09-30T00:00:00ANONYMOUSv4_computersD143D69C68D10C671.516


PRP results:
No PRP results for M6952571


P-1 factor-bounds graph:
B1 = 4000000, B2 = 456818670 (P-1 stage 2)
B1 = 2000000, B2 = 58000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 445000, B2 = 13350000 (P-1 stage 2)
B1 = 445000 (P-1 stage 1)
B1 = 25000, B2 = 87500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-03T20:44:24+00:00