is 2 4307377 - 1
has 1296650 decimal digits
takes 0.537 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1BECE3881F755D8Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.898465.6716%13000026325000.04823.2910%6.946566.8014%1.1298%
PrimeNet2610.071362.2951%180003600000.00662.9267%0.077963.3986%1.1035%
GPU722651.693864.6154%240005000000.00901.9823%1.702865.3168%0.7014%
Difference+2+5.2046+1.0563%+106000+2132500+0.0391+1.3087%+5.2437+1.4846%+1.4846%

Known prime factors (1 factor, 75.2 bits, 0.00174621% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4307377438715101234641957836092375.2165092601613866652
22 × 3 × 1373 × 309092110577
2016-07-1913733090921105772,057.93,045.55,688.1

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-03T04:56:00Carsten Kossendeydurandal25000343750---0.008--1.364%
2011-08-30T03:56:00harleeP4_260050000775000---0.016--2.037%
2013-08-23T18:49:00Squeeky_SquirrelT7500_22001300002632500---0.048--3.291%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-01-22T00:00:00ANONYMOUSv4_computers21261--0.071--
2010-12-12T01:43:00markroldgamer261262--0.071--
2012-01-14T04:23:00GrunwalderGIMPManual testing21263--0.371--
2016-02-23T16:29:53Mark RoseManual testing262263--0.228--
2014-05-12T04:13:00JayderManual testing263264--0.456--
2014-05-13T13:03:00lycornManual testing264265--0.867--
2015-06-14T11:55:00snme2pm1Manual testing265266--1.735--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.463 GHz-days
Estimated T-Level:0.400
DigitsB1CurvesCompleteFacMiss
20110008 / 1000.08092.274%
25500008 / 2800.02997.178%

New Calculation Method

Total ECM effort:1.463 GHz-days
Estimated T-Level:0.400
DigitsB1CompleteFacMiss
20110000.25877.255%
25500000.02397.695%
302500000.00199.856%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.097
50000500000020.366


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-02-16T00:00:00vidmarv4_computers1BECE3881F755D8C0.537


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:18:19kkmrkkblmbrbkManual testing
43871510123464195783609
23EEC760072231__no
2018-01-30T01:40:38Oliver KruseGTX-4
43871510123464195783609
23EEC760072231__no


P-1 factor-bounds graph:
B1 = 130000, B2 = 2632500 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
B1 = 50000, B2 = 775000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
B1 = 25000, B2 = 343750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
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262
261
250
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2100
Last modified: 2018-01-30T01:40:38+00:00