is 2 6998423 - 1
has 2106736 decimal digits
takes 1.526 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2E1CCA996449F5F3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272136.649968.0556%20000002586265505.05316.9850%141.703070.2869%2.2313%
PrimeNet2630.228163.4921%300008000000.02273.3134%0.250864.7017%1.2097%
GPU722674.245865.6716%450009000000.02902.2405%4.274866.4408%0.7691%
Difference+5+132.4041+2.3839%+1955000+257726550+5.0242+4.7446%+137.4282+3.8461%+1.4622%

Known prime factors:
No known factors for M6998423

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-09-22T00:00:00ANONYMOUSv4_computers2500087500---0.009--0.432%
2011-09-09T04:42:00Carsten Kossendeymother44500013572500---0.367--3.529%
2021-11-12T21:46:16Seth_TrManual testing30000007500000012---2.189--5.989%
2021-12-06T08:11:48Seth_TrManual testing2000000258626550---5.053--6.985%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-07-21T00:00:00ANONYMOUSv4_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--
2016-04-28T01:09:03Gordon SpenceManual testing266267--2.136--
2018-02-26T00:49:27-Anonymous-Manual testing267268--4.271--
2020-04-03T12:20:53TJAOIManual testing268269--8.542--
2020-07-29T12:59:51takahashiManual testing269270--17.08--
2020-09-22T23:36:40takahashiManual testing270271--34.17--
2021-09-26T07:28:29SRBaseManual testing271272--68.34--


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)
1999-03-26T00:00:00ANONYMOUSv4_computers2E1CCA996449F5F31.526
2001-10-06T00:00:00ANONYMOUSv4_computers2E1CCA996449F5F31.526


PRP results:
No PRP results for M6998423


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 = 25000, B2 = 87500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-06T08:11:48+00:00