is 2 6919607 - 1
has 2083010 decimal digits
takes 1.509 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L19129FBBCAEE2E7Edouble-checked
PRPFA2CD6E8BBF49554PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272138.206468.0556%40000004567054809.06328.0778%147.269670.6360%2.5804%
PrimeNet2630.230763.4921%280007000000.02043.1600%0.251164.6457%1.1536%
GPU722674.294265.6716%450009000000.02902.2363%4.323166.4393%0.7677%
Difference+5+133.9122+2.3839%+3955000+455805480+9.0342+5.8416%+142.9464+4.1967%+1.8127%

Known prime factors (1 factor, 81.3 bits, 0.00117559% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
691960730741264384981994566341032581.346222131577595244893
233 × 2397007 × 397727003
2021-11-292397007397727003127,9617.568012.797

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-11-24T00:00:00ANONYMOUSv4_computers35000341250---0.016--0.798%
2011-11-22T00:52:00James Heinrichi7-9201300002665000---0.085--1.986%
2020-01-11T13:36:44takahashivaio6000001200000012---0.386--3.581%
2021-11-29T05:49:43Seth_TrManual testing40000004567054802581.3469.0633.01818.138.078%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-09-20T00:00:00ANONYMOUSv4_computers21261--0.044--
1998-10-04T00:00:00ANONYMOUSv4_computers21262--0.089--
2005-02-12T00:00:00ANONYMOUSv4_computers21263--0.231--
2014-02-09T10:09:00NesowaManual testing263264--0.284--
2014-02-17T19:28:00lycornManual testing264265--0.540--
2015-06-26T13:39:00VictordeHollanderManual testing265266--1.080--
2016-04-02T19:16:00Gordon SpenceManual testing266267--2.160--
2018-02-27T00:21:35-Anonymous-Manual testing267268--4.320--
2020-05-15T09:09:06TJAOIManual testing268269--8.639--
2021-07-18T04:15:11takahashiManual testing269270--17.28--
2021-08-11T16:36:40SRBaseManual testing270271--34.56--
2021-09-25T07:22:15SRBaseManual testing271272--69.12--


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_computers19129FBBCAEE2E7E1.509
2002-03-31T00:00:00ANONYMOUSv4_computers19129FBBCAEE2E7E1.509


PRP results:
dateuseridcompidcofactorsres64PRP
2021-12-05T05:11:11LaurVZero818
3074126438498199456634103
FA2CD6E8BBF49554no


P-1 factor-bounds graph:
B1 = 4000000, B2 = 456705480 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 600000, B2 = 12000000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 130000, B2 = 2665000 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 35000, B2 = 341250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-05T05:11:11+00:00