is 2 1440269 - 1
has 433565 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-L085AADE80FE0CC01double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.630868.6567%2000000600000000.28577.2239%20.916570.9209%2.2642%
PrimeNet2560.006762.5000%65001100000.00072.7774%0.007363.5415%1.0415%
GPU722600.106665.0000%6000900000.00061.3552%0.107265.4743%0.4743%
Difference+7+20.5242+3.6567%+1994000+59910000+0.2851+5.8688%+20.8093+5.4466%+5.4466%

Known prime factors (1 factor, 79.3 bits, 0.00550564% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14402697421078946184523546309832479.296257628225914205039
33 × 9541786144970557
2015-03-17279541786144970557165,21228,780,54553,754,043

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.838%
2010-05-15T19:11:00Rob_Deetwopc100000200000---0.006--1.215%
2010-05-16T14:50:00Rob_Deetwopc2000001000000---0.013--2.330%
2010-05-19T17:48:00Rob_Deetwopc2000002000000---0.017--2.817%
2010-05-20T15:09:00Rob_Deetwopc2000003000000---0.020--3.108%
2010-05-21T14:32:00Rob_Deetwopc2000004000000---0.023--3.317%
2010-05-22T14:50:00Rob_Deetwopc2000005000000---0.026--3.481%
2014-11-14T01:20:00Jocelyn LaroucheManual testing244564244564---0.014--1.385%
2015-01-27T21:58:00Jocelyn LaroucheManual testing325514325514---0.018--1.588%
2015-01-30T21:42:00Jocelyn LaroucheManual testing358065358065---0.020--1.660%
2015-02-13T17:59:00Jocelyn LaroucheManual testing393871393871---0.022--1.733%
2015-02-25T03:47:00Jocelyn LaroucheManual testing476583476583---0.026--1.885%
2015-03-03T20:46:00Jocelyn LaroucheManual testing524241524241---0.029--1.964%
2015-03-10T07:55:00Jocelyn LaroucheManual testing576665576665---0.032--2.045%
unknown200000060000000---0.286--7.224%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-13T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.027--
2010-05-10T18:40:00Architects Cubeda3_bu2260261--0.107--
2011-05-07T23:53:00GrunwalderGIMPManual testing21263--1.108--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.499 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.499 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025011.82
50000500000010.047
250000350000005013.63


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computers085AADE80FE0CC010.055


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T23:51:28Oliver KruseGTX-1
742107894618452354630983
3B0A71176692D5__no
2017-10-27T05:30:28kkmrkkblmbrbkc4.xlarge
742107894618452354630983
3B0A71176692D5__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 576665 (P-1 stage 1)
B1 = 524241 (P-1 stage 1)
B1 = 476583 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 393871 (P-1 stage 1)
B1 = 358065 (P-1 stage 1)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 325514 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 244564 (P-1 stage 1)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (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: 2021-12-28T11:11:54+00:00