is 2 6351613 - 1
has 1912027 decimal digits
takes 1.126 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L08FCF1D63FDF6E3Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272150.565568.0556%2500000500285101.30795.4344%151.873369.7915%1.7360%
PrimeNet2620.096762.9032%280006000000.01523.4115%0.111964.1688%1.2656%
GPU722662.325165.1515%4500010000000.02492.5695%2.350166.0469%0.8954%
Difference+6+148.2403+2.9040%+2455000+49028510+1.2829+2.8649%+149.5233+3.7446%+0.8406%

Known prime factors:
No known factors for M6351613

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-06-25T09:50:00Carsten Kossendeyleela35000490000---0.015--0.879%
2014-10-09T22:17:00Nesowanewfs3850009721250---0.230--3.186%
2022-09-09T18:15:56takahashivaio250000050028510---1.308--5.434%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21262--0.097--
2016-02-23T16:39:23Mark RoseManual testing262263--0.155--
2014-08-17T11:19:00NesowaManual testing263264--0.309--
2014-08-21T21:50:00lycornManual testing264265--0.588--
2015-10-20T20:25:46snme2pm1Manual testing265266--1.177--
2016-04-02T19:16:21Gordon SpenceManual testing266267--2.353--
2018-06-04T09:45:20ramgeisManual testing267268--4.706--
2020-04-30T23:07:49takahashiManual testing268269--9.412--
2021-02-07T03:13:22takahashiManual testing269270--18.82--
2021-12-26T10:55:10mikrManual testing270271--37.65--
2022-06-17T07:36:37takahashiManual testing271272--75.30--


ECM factoring results:
Total ECM effort:1.617 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.617


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-16T00:00:00ANONYMOUSv4_computers08FCF1D63FDF6E3E1.126


PRP results:
No PRP results for M6351613


P-1 factor-bounds graph:
B1 = 2500000, B2 = 50028510 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 385000, B2 = 9721250 (P-1 stage 2)
B1 = 385000 (P-1 stage 1)
B1 = 35000, B2 = 490000 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-09-09T18:15:56+00:00