is 2 6910369 - 1
has 2080229 decimal digits
takes 1.507 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L30EC2F40250D0D40double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual272138.391168.0556%1000000300000000.81574.5584%139.206969.5117%
Target2674.299965.6716%4500072000000.13752.2358%4.437466.4391%
Difference+5+134.0912+2.3839%+955000+22800000+0.6783+2.3226%+134.7695+3.0726%

Known prime factors:
No known factors for M6910369

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-11-24ANONYMOUSv4_computers3000030000---0.009--0.234%
2002-03-31shaneamyv4_computers35000516250---0.019--0.907%
2012-08-11NesowaEPC850001487500---0.051--1.559%
2019-04-26takahashivaio30000050000006---0.176--2.681%
2021-05-15takahashivaio10000003000000012---0.816--4.558%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05ANONYMOUSv4_computers21262--0.089--
2005-02-02ANONYMOUSv4_computers21263--0.231--
2014-02-09NesowaManual testing263264--0.284--
2014-02-17lycornManual testing264265--0.541--
2015-06-26VictordeHollanderManual testing265266--1.081--
2016-04-01Gordon SpenceManual testing266267--2.163--
2018-02-25-Anonymous-Manual testing267268--4.326--
2019-12-16mnd9Manual testing268269--8.651--
2021-07-14takahashiManual testing269270--17.30--
2021-08-19SRBaseManual testing270271--34.60--
2021-09-25SRBaseManual testing271272--69.21--


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)
1999-08-22ANONYMOUSv4_computers02DA294A3DD370E21.507
2002-01-22ANONYMOUSv4_computers30EC2F40250D0D401.507
2002-04-07shaneamyv4_computers30EC2F40250D0D401.507


PRP results:
No PRP results for M6910369


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 300000, B2 = 5000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 85000, B2 = 1487500 (P-1 stage 2)
B1 = 85000 (P-1 stage 1)
B1 = 35000, B2 = 516250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
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
250
260
270
280
Last modified: 2023-06-05T21:50:05+00:00