is 2 1441051 - 1
has 433800 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA9679FA6245EDA58double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.619668.6567%500000150000000.07144.9244%20.691070.2002%1.5435%
PrimeNet2560.006762.5000%65001100000.00072.7777%0.007363.5416%1.0416%
GPU722600.106665.0000%6000900000.00061.3553%0.107265.4744%0.4744%
Difference+7+20.5130+3.6567%+494000+14910000+0.0708+3.5691%+20.5839+4.7258%+4.7258%

Known prime factors (1 factor, 77.9 bits, 0.00540859% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14410512900344429546612423336312477.941100632955722823565
5 × 20126591144564713
2008-12-1852012659114456471325,67760,707,110113,383,976

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.838%
2016-03-17T19:14:22alpertronManual testing5000001500000012---0.071--4.924%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.027--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.454 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000300 / 1003.0004.904%
2550000300 / 2801.07134.186%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.454 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.6150.000%
25500001.64719.258%
302500000.14186.886%
3510000000.01099.022%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025011.82
250000350000005013.63


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computersA9679FA6245EDA580.055


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T00:02:56Oliver KruseGTX-1
290034442954661242333631
37DB59FE9BE5CB__no
2017-10-27T05:57:19kkmrkkblmbrbkc4.xlarge
290034442954661242333631
37DB59FE9BE5CB__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-28T11:11:51+00:00