is 2 14896373 - 1
has 4484256 decimal digits
takes 7.134 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8A61443A39586A8Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273128.410167.1233 %17000024225000.20332.0423 %128.613367.7947 %
Target2698.014565.2174 %100000130000000.55752.9903 %8.572066.2575 %
Difference+4+120.3956+1.9059 %+70000-10577500-0.3542-0.9479 %+120.0414+1.5373 %

Known prime factors:
No known factors for M14896373

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-03-03ANONYMOUSv4_computers1700002422500--0.2033.212%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-31Net_Forcev4_computers212570.002
2000-09-08Net_Forcev4_computers212580.003
2000-09-15Net_Forcev4_computers212590.003
2001-02-11ANONYMOUSv4_computers212650.251
2014-06-29NesowaManual testing2652660.502
2015-10-20NesowaManual testing2662671.003
2018-02-05ramgeisManual testing2672696.020
2021-07-18lycornManual testing2692708.026
2021-09-03SRBaseManual testing27027116.05
2021-10-17ANONYMOUSManual testing27127232.11
2021-12-03ANONYMOUSManual testing27227364.21


ECM factoring results:
Total ECM effort:0.728 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-05-18ANONYMOUSv4_computers8A61443A39586A8B7.134
2005-09-03davidb_KSv4_computers8A61443A39586A8B7.134


PRP results:
No PRP results for M14896373


CERT results:
No CERT results for M14896373


P-1 factor-bounds graph:
B1 = 170000, B2 = 2422500 (P-1 stage 2)
B1 = 170000 (P-1 stage 1)
104
105
106
104
105
106
107
TF factor-bounds graph:
273
272
271
270
269
267
266
265
259
258
257
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
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260
270
280
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Last modified: 2024-03-13T02:15:48+00:00