is 2 13782371 - 1
has 4148908 decimal digits
takes 6.115 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF962FC723FC215DCdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27269.388266.6667%30000060000000.39283.0689%69.781067.6896%1.0230%
PrimeNet2650.529463.0769%6000019000000.10313.9928%0.632464.5512%1.4742%
GPU722698.662365.2174%9000022000000.13192.7911%8.794166.1882%0.9708%
Difference+3+60.7259+1.4493%+210000+3800000+0.2609+0.2778%+60.9868+1.5014%+1.5014%

Known prime factors:
No known factors for M13782371

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-02-10T00:00:00ANONYMOUSv4_computers130000585000---0.100--1.444%
2016-04-18T08:00:20ThaRiet-Ubuntu300000600000012---0.393--3.069%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-07-17T00:00:00ANONYMOUSv4_computers21264--0.258--
2000-08-01T00:00:00ANONYMOUSv4_computers21265--0.529--
2014-07-02T04:17:00NesowaManual testing265266--0.542--
2015-08-20T10:16:00NesowaManual testing266267--1.084--
2017-12-22T13:48:42-Anonymous-Manual testing267268--2.169--
2018-01-14T22:54:48ramgeisManual testing268269--4.338--
2021-08-09T19:18:47SRBaseManual testing269270--8.675--
2021-09-06T18:08:08SRBaseManual testing270271--17.35--
2021-09-29T01:49:02Dylan DelgadoGPU72_TF271272--34.70--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.675 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.675 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.675


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-31T00:00:00ANONYMOUSv4_computersF962FC723FC215DC6.115
2005-03-06T00:00:00ANONYMOUSv4_computersF962FC723FC215DC6.115


PRP results:
No PRP results for M13782371


P-1 factor-bounds graph:
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 130000, B2 = 585000 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
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107
TF factor-bounds graph:
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2100
Last modified: 2021-09-29T01:49:02+00:00