is 2 13948397 - 1
has 4198886 decimal digits
takes 6.189 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF5355DACDD4348C1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27268.562366.6667%16500031350000.21032.4030%68.772567.4677%0.8010%
PrimeNet2650.523063.0769%6000019000000.10313.9998%0.626164.5538%1.4768%
GPU722698.559265.2174%9000024000000.13892.8515%8.698066.2092%0.9918%
Difference+3+60.0031+1.4493%+75000+735000+0.0714-0.4485%+60.0745+1.2584%+1.2584%

Known prime factors:
No known factors for M13948397

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-12-08T00:00:00ANONYMOUSv4_computers1650003135000---0.210--2.403%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-01T00:00:00lalerav4_computers21254--0.000--
2000-08-17T00:00:00ANONYMOUSv4_computers21265--0.523--
2014-07-15T13:19:00NesowaManual testing265266--0.536--
2015-09-13T10:58:00NesowaManual testing266267--1.071--
2017-12-22T04:01:22-Anonymous-Manual testing267268--2.143--
2018-01-29T09:55:12ramgeisManual testing268269--4.286--
2021-08-09T19:57:29SRBaseManual testing269270--8.572--
2021-09-05T07:13:25SRBaseManual testing270271--17.14--
2021-10-25T13:05:47-Anonymous-Manual testing271272--34.29--


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
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.675


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-08T00:00:00ANONYMOUSv4_computersF5355DACDD4348C16.189
2005-05-12T00:00:00ANONYMOUSv4_computersF5355DACDD4348C16.189


PRP results:
No PRP results for M13948397


P-1 factor-bounds graph:
B1 = 165000, B2 = 3135000 (P-1 stage 2)
B1 = 165000 (P-1 stage 1)
104
105
106
104
105
106
107
TF factor-bounds graph:
272
271
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269
268
267
266
265
254
250
260
270
280
290
2100
Last modified: 2021-10-25T13:05:47+00:00