is 2 6957737 - 1
has 2094488 decimal digits
takes 1.517 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF57859506A6B2742double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272137.449068.0556%40000004568186709.06528.0823%146.514170.6374%2.5819%
PrimeNet2630.229463.4921%280007000000.02043.1628%0.249864.6467%1.1547%
GPU722674.270665.6716%450009000000.02902.2383%4.299666.4400%0.7684%
Difference+5+133.1783+2.3839%+3955000+455918670+9.0362+5.8440%+142.2145+4.1974%+1.8135%

Known prime factors:
No known factors for M6957737

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-10T00:00:00ANONYMOUSv4_computers35000472500---0.019--0.885%
2001-11-17T00:00:00ANONYMOUSv4_computers35000472500---0.019--0.885%
2012-08-21T17:10:00NesowaEPC850001508750---0.051--1.566%
2018-03-16T20:43:20Squeeky_Squirreli5-5250U_16004050001235250012---0.334--3.413%
2021-11-07T16:08:21Seth_TrManual testing20000005800000012---1.597--5.521%
2021-12-04T04:58:21Seth_TrManual testing4000000456818670---9.065--8.082%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-29T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-08-02T00:00:00ANONYMOUSv4_computers21262--0.088--
2005-07-17T00:00:00ANONYMOUSv4_computers21263--0.229--
2014-02-09T10:13:00NesowaManual testing263264--0.282--
2014-02-16T01:23:00lycornManual testing264265--0.537--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.074--
2016-04-06T22:58:00Gordon SpenceManual testing266267--2.148--
2018-05-22T09:40:46ramgeisManual testing267268--4.296--
2020-04-24T07:21:01TJAOIManual testing268269--8.592--
2021-08-01T22:39:25takahashiManual testing269270--17.18--
2021-08-11T16:30:22SRBaseManual testing270271--34.37--
2021-09-28T14:58:48SRBaseManual testing271272--68.74--


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_computersF57859506A6B27421.517
2001-09-22T00:00:00ANONYMOUSv4_computersF57859506A6B27421.517
2001-11-17T00:00:00ANONYMOUSv4_computersF57859506A6B27421.517


PRP results:
No PRP results for M6957737


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 = 405000, B2 = 12352500 (P-1 stage 2)
B1 = 405000 (P-1 stage 1)
B1 = 85000, B2 = 1508750 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
B1 = 35000, B2 = 472500 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-04T04:58:21+00:00