is 2 6995399 - 1
has 2105825 decimal digits
takes 1.525 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6013A782B3DC4099double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272136.708968.0556%20000002586265505.05316.9847%141.762170.2868%2.2312%
PrimeNet2630.228263.4921%300008000000.02273.3132%0.250964.7016%1.2096%
GPU722674.247665.6716%450009000000.02902.2403%4.276666.4407%0.7691%
Difference+5+132.4613+2.3839%+1955000+257726550+5.0242+4.7444%+137.4855+3.8461%+1.4622%

Known prime factors:
No known factors for M6995399

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-22T00:00:00ANONYMOUSv4_computers3000030000---0.009--0.235%
2011-05-21T13:21:00Carsten Kossendeymother44500013572500---0.367--3.529%
2021-11-09T16:02:06Seth_TrManual testing30000007500000012---2.189--5.988%
2021-12-06T07:38:08Seth_TrManual testing2000000258626550---5.053--6.985%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-24T00:00:00ANONYMOUSv4_computers21262--0.088--
2004-04-09T00:00:00Sturle Sundev4_computers21263--0.228--
2014-02-09T10:18:00NesowaManual testing263264--0.281--
2014-02-14T08:55:00lycornManual testing264265--0.534--
2015-07-03T01:16:00VictordeHollanderManual testing265266--1.068--
2016-04-28T01:09:02Gordon SpenceManual testing266267--2.136--
2018-02-26T00:49:28-Anonymous-Manual testing267268--4.273--
2020-04-03T12:20:54TJAOIManual testing268269--8.546--
2020-07-27T22:34:21takahashiManual testing269270--17.09--
2020-09-20T07:15:30takahashiManual testing270271--34.18--
2021-09-26T07:26:50SRBaseManual testing271272--68.37--


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)
1999-09-22T00:00:00ANONYMOUSv4_computers6013A782B3DC40991.525
2002-03-24T00:00:00ANONYMOUSv4_computers6013A782B3DC40991.525


PRP results:
No PRP results for M6995399


P-1 factor-bounds graph:
B1 = 2000000, B2 = 258626550 (P-1 stage 2)
B1 = 3000000, B2 = 75000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 445000, B2 = 13572500 (P-1 stage 2)
B1 = 445000 (P-1 stage 1)
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
250
260
270
280
290
2100
Last modified: 2021-12-06T07:38:08+00:00