is 2 1329721 - 1
has 400286 decimal digits
takes 0.051 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L04AA469385ADD332double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual270179.699870.0000%1330000385700000.18604.9015%179.885871.4704%1.4704%
PrimeNet2560.007262.5000%60001000000.00062.6052%0.007863.4770%0.9770%
GPU722600.115565.0000%5500400000.00040.9783%0.115965.3424%0.3424%
Difference+10+179.5843+5.0000%+1324500+38530000+0.1855+3.9232%+179.7699+6.1281%+1.1281%

Known prime factors (2 factors, 157.5 bits, 0.01184371% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13297217535060819869980184072169.352283332399047243
72 × 13 × 29 × 15337649491
2014-03-084915337649491101.9146.26286.405
13297213401088576252253524606252172788.136127887300277736966048
25 × 3996478133679280189
2021-07-0232399647813367928018977,835,5401.205e+102.251e+10

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
132972125627409275825729059321532880689980767129436931948157.488
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00Team Prime Ribv4_computers15000213750---0.001--0.488%
2013-08-25T09:14:00David Campeaui5-2500k133000038570000---0.186--4.901%
2016-03-17T19:05:04alpertronManual testing5000001500000012---0.071--3.625%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers21257--0.014--
2003-06-23T00:00:00ANONYMOUSv4_computers21258--0.029--
2022-03-07T17:32:33LordJuliusManual testing258260--0.087--
2009-02-15T05:13:00Sturle Sundescarpia.ifi260261--0.116--
2012-09-11T06:42:00lycornManual testing261264--2.446--
2013-10-18T08:26:00David CampeauManual testing264265--2.810--
2014-02-04T13:06:00Never Odd Or EvenManual testing265266--5.620--
2014-02-04T13:06:00Never Odd Or EvenManual testing266267--11.24--
2014-02-04T13:06:00Never Odd Or EvenManual testing267268--22.48--
2014-02-04T13:06:00Never Odd Or EvenManual testing268269--44.96--
2014-02-04T13:06:00Never Odd Or EvenManual testing269270--89.92--
2014-03-08T14:38:00Never Odd Or EvenManual testing26927069.3522112.130.10324.64


ECM factoring results:
Total ECM effort:25.136 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025111.71
250000350000004712.62
2500003500000030.806


Lucas-Lehmer results:
No L-L results for M1329721


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T04:31:04Oliver KruseGTX-0
753506081986998018407
DE065E0A972CCB__no
2017-10-23T18:36:25kkmrkkblmbrbkc4.xlarge
753506081986998018407
DE065E0A972CCB__no
2021-07-03T18:14:51RichD0CoLab-1
753506081986998018407
340108857625225352460625217
759F9E734F61F0D5no


P-1 factor-bounds graph:
B1 = 1330000, B2 = 38570000 (P-1 stage 2)
B1 = 1330000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 213750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-07T17:32:33+00:00