is 2 3764477 - 1
has 1133221 decimal digits
takes 0.395 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP152EDA1CA59B391Dverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27063.475168.5714%1600000660000000.77806.1512%64.253170.5047%1.9332%
PrimeNet2600.040863.3333%170003400000.00533.1828%0.046164.5003%1.1670%
GPU722640.945565.6250%240004500000.00722.1596%0.952766.3674%0.7424%
Difference+6+62.5296+2.9464%+1576000+65550000+0.7708+3.9916%+63.3004+4.1373%+4.1373%

Known prime factors (1 factor, 74.0 bits, 0.00196541% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3764477187246988102905322675112373.9872487025264105815
3 × 5 × 19 × 8726404435459
2021-11-01198726404435459945.3672,405135,232

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-12T06:21:00Carsten Kossendeydurandal20000265000---0.005--0.731%
2012-04-05T22:08:00Squeeky_SquirrelP4_26001100002035000---0.033--2.077%
2016-01-18T01:35:52mikrMSI16000006600000012---0.778--6.151%
2022-03-03T20:37:56Jocelyn LaroucheManual testing9000090000---0.014--0.624%
2022-03-22T11:10:18Jocelyn LaroucheManual testing100000100000---0.015--0.667%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:38Mark RoseManual testing21260--0.041--
2009-03-02T16:30:00S485122USB-Z260261--0.041--
2011-04-22T16:26:00markroldgamer261262--0.082--
2012-03-23T23:44:00GrunwalderGIMPManual testing21263--0.424--
2016-02-23T16:29:38Mark RoseManual testing262263--0.261--
2015-01-25T20:42:00VictordeHollanderManual testing263264--0.522--
2015-01-25T20:42:00VictordeHollanderManual testing264265--0.993--
2016-02-28T22:17:33ramgeisManual testing265266--1.985--
2016-11-09T06:37:54Gordon SpenceManual testing266267--3.970--
2019-01-21T12:54:00TJAOIManual testing267268--7.940--
2019-02-08T06:02:17YxinityManual testing267268--7.940--
2020-12-06T06:00:29axnManual testing268269--15.88--
2021-03-28T17:26:50axnManual testing269270--31.76--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.440 GHz-days
Estimated T-Level:1.150
DigitsB1CurvesCompleteFacMiss
201100023 / 1000.23079.361%
255000023 / 2800.08292.100%

New Calculation Method

Total ECM effort:3.440 GHz-days
Estimated T-Level:1.150
DigitsB1CompleteFacMiss
20110000.74247.619%
25500000.06793.514%
302500000.00499.588%


ECM Summary

B1B2factorcurvesGHz-days
500005000000192.842
50000500000040.598


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-16T00:00:00ANONYMOUSv4_computers9392A86F01F60E__0.395


PRP results:
dateuseridcompidcofactorsres64PRP
2021-11-07T15:45:18kutensspica
18724698810290532267511
152EDA1CA59B391Dno


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 = 100000 (P-1 stage 1)
B1 = 90000 (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: 2022-03-22T11:10:18+00:00