is 2 3745997 - 1
has 1127658 decimal digits
takes 0.393 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9069B17078D5EC19double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27063.788368.5714%1600000660000000.77806.1479%64.566370.5036%1.9322%
PrimeNet2600.041063.3333%160003200000.00503.0903%0.046064.4664%1.1331%
GPU722640.950265.6250%220004500000.00692.1103%0.957166.3504%0.7254%
Difference+6+62.8381+2.9464%+1578000+65550000+0.7711+4.0377%+63.6092+4.1532%+4.1532%

Known prime factors:
No known factors for M3745997

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-07T04:44:00Carsten Kossendeyleela20000265000---0.005--0.730%
2013-03-14T07:25:00Squeeky_SquirrelT7500_22001100002035000---0.033--2.075%
2015-11-15T06:11:33mikrMSI16000006600000012---0.778--6.148%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-01-13T00:00:00ANONYMOUSv4_computers21260--0.041--
1999-08-16T00:00:00ANONYMOUSv4_computers21260--0.041--
2009-03-05T16:15:00S485122USB-A260261--0.041--
2011-05-06T21:14:00markrManual testing21262--0.164--
2012-05-10T01:21:00GrunwalderGIMPManual testing21263--0.426--
2016-02-23T16:29:38Mark RoseManual testing262263--0.262--
2015-01-23T13:17:00VictordeHollanderManual testing263264--0.524--
2015-01-23T13:17:00VictordeHollanderManual testing264265--0.997--
2016-02-26T10:03:31ramgeisManual testing265266--1.995--
2016-11-05T16:44:58Gordon SpenceManual testing266267--3.990--
2018-07-23T16:23:29TJAOIManual testing267268--7.979--
2020-12-09T06:50:42axnManual testing268269--15.96--
2021-03-20T14:30:20axnManual testing269270--31.92--


ECM factoring results:

Old Calculation Method

Total ECM effort:6.170 GHz-days
Estimated T-Level:2.000
DigitsB1CurvesCompleteFacMiss
201100040 / 1000.40066.897%
255000040 / 2800.14386.666%

New Calculation Method

Total ECM effort:6.170 GHz-days
Estimated T-Level:2.000
DigitsB1CompleteFacMiss
20110001.56120.995%
25500000.14586.530%
302500000.00999.090%


ECM Summary

B1B2factorcurvesGHz-days
500005000000334.931
50000700000071.239


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-03-23T00:00:00ANONYMOUSv4_computers9069B17078D5EC190.393
1999-08-31T00:00:00ANONYMOUSv4_computers9069B17078D5EC190.393


PRP results:
No PRP results for M3745997


P-1 factor-bounds graph:
B1 = 1600000, B2 = 66000000 (P-1 stage 2)
B1 = 1600000 (P-1 stage 1)
B1 = 110000, B2 = 2035000 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-05-12T06:32:45+00:00