is 2 6926239 - 1
has 2085006 decimal digits
takes 1.510 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC86EB89525327607double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272138.074068.0556%40000004143239108.33317.9720%146.407170.6022%
Target2674.290165.6716%450009000000.02902.2366%4.319066.4394%
Difference+5+133.7840+2.3839%+3955000+413423910+8.3042+5.7354%+142.0881+4.1627%

Known prime factors:
No known factors for M6926239

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-10-20ANONYMOUSv4_computers35000472500---0.019--0.884%
2012-08-16NesowaEPC850001508750---0.051--1.565%
2018-03-16Squeeky_Squirreli5-5250U_16004050001225125012---0.332--3.405%
2021-06-02Dylan DelgadoManual testing6300001890000012---0.514--3.947%
2021-11-27Seth_TrManual testing400000011000000012---3.091--6.531%
2021-12-02Seth_TrManual testing4000000414323910---8.333--7.972%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11ANONYMOUSv4_computers21262--0.089--
1999-10-15ANONYMOUSv4_computers21263--0.230--
2014-02-09NesowaManual testing263264--0.283--
2014-02-17lycornManual testing264265--0.539--
2015-06-26VictordeHollanderManual testing265266--1.079--
2016-04-03Gordon SpenceManual testing266267--2.158--
2018-05-23ramgeisManual testing267268--4.316--
2020-05-01TJAOIManual testing268269--8.631--
2021-07-22takahashiManual testing269270--17.26--
2021-08-11SRBaseManual testing270271--34.52--
2021-10-11SRBaseManual testing271272--69.05--


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)
1999-03-15ANONYMOUSv4_computersC6097014F7AA19__1.510
2000-07-12ANONYMOUSv4_computersC86EB895253276071.510
2001-12-22ANONYMOUSv4_computersC86EB895253276071.510


PRP results:
No PRP results for M6926239


P-1 factor-bounds graph:
B1 = 4000000, B2 = 414323910 (P-1 stage 2)
B1 = 4000000, B2 = 110000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 630000, B2 = 18900000 (P-1 stage 2)
B1 = 405000, B2 = 12251250 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
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)
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=1.15 ~= -13-bit
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Last modified: 2023-04-26T21:34:10+00:00