is 2 6942361 - 1
has 2089859 decimal digits
takes 1.514 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7319D465474F1029double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272137.753468.0556%20000002588493605.05696.9801%142.810370.2853%
Target2674.280165.6716%4500072000000.13752.2375%4.417666.4397%
Difference+5+133.4733+2.3839%+1955000+251649360+4.9195+4.7426%+138.3928+3.8456%

Known prime factors:
No known factors for M6942361

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-16MadPoov4_computers30000270000---0.014--0.705%
2011-11-28James HeinrichQ66001300002827500---0.088--2.015%
2020-01-18takahashivaio6000001200000012---0.386--3.583%
2021-12-06Seth_TrManual testing2000000258849360---5.057--6.980%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05ANONYMOUSv4_computers21262--0.088--
1998-07-21ANONYMOUSv4_computers21262--0.088--
1998-07-29ANONYMOUSv4_computers21262--0.088--
1998-08-16ANONYMOUSv4_computers21262--0.088--
1998-10-04ANONYMOUSv4_computers21262--0.088--
2005-03-06ANONYMOUSv4_computers21263--0.230--
2014-02-09NesowaManual testing263264--0.283--
2014-02-16lycornManual testing264265--0.538--
2015-06-26VictordeHollanderManual testing265266--1.076--
2016-04-05Gordon SpenceManual testing266267--2.153--
2018-05-23ramgeisManual testing267268--4.306--
2020-04-24TJAOIManual testing268269--8.611--
2021-07-28takahashiManual testing269270--17.22--
2021-08-10SRBaseManual testing270271--34.44--
2021-09-25SRBaseManual testing271272--68.89--


ECM factoring results:
Total ECM effort:2.984 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000092.984


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02ANONYMOUSv4_computers7319D465474F10291.514
2001-10-25MadPoov4_computers7319D465474F10291.514


PRP results:
No PRP results for M6942361


P-1 factor-bounds graph:
B1 = 2000000, B2 = 258849360 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 600000, B2 = 12000000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 130000, B2 = 2827500 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 30000, B2 = 270000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
263
262
this exponent TF target: 67
TF double-checked to: 67.8
ECM T-Level=1.73 ~= -11-bit
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270
280
Last modified: 2023-06-05T21:50:05+00:00