is 2 6054739 - 1
has 1822659 decimal digits
takes 1.073 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE96F54D76B9EFD26double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273315.925268.4932 %2000000601782489084.73889.3145 %400.664071.4279 %
Target2662.439265.1515 %4000045000000.07272.4208 %2.511965.9951 %
Difference+7+313.4860+3.3416 %+1960000+6013324890+84.6661+6.8937%+398.1521+5.4327 %

Known prime factors (1 factor, 76.1 bits, 0.00125712% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6054739818499466000382315498172376.1156759163904508372
22 × 3 × 7 × 23 × 3319 × 1054092209
2022-02-01331910540922093,354.814.75927.564

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-11-15ANONYMOUSv4_computers2500025000--0.0060.539%
2011-04-01markrtiny11000021725006--0.0573.604%
2019-05-29takahashivaio400000750000012--0.2025.513%
2022-02-01lycornColab_D2000000601782489022376.115104.315.359%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-11-07ANONYMOUSv4_computers212620.051
2016-02-23Mark RoseManual testing2622630.162
2014-09-12NesowaManual testing2632640.324
2014-09-16monstManual testing2642650.617
2015-10-07snme2pm1Manual testing2652661.234
2016-03-12Gordon SpenceManual testing2662672.468
2018-05-29ramgeisManual testing2672684.937
2020-03-03takahashiManual testing2682699.87
2020-10-05takahashiManual testing26927019.75
2020-11-01takahashiManual testing27027139.49
2021-09-19SRBaseManual testing27127278.99
2022-01-10takahashiManual testing272273158.0


ECM factoring results:
Total ECM effort:1.617 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.617


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23ANONYMOUSv4_computersE96F54D76B9EFD261.073
2000-12-07ANONYMOUSv4_computersE96F54D76B9EFD261.073


PRP results:
dateuseridcompidcofactorsres64
2022-02-06ATHec2-PRPCFDC
81849946600038231549817
F02BBBA2F416A939


CERT results:
dateuseridcompid
2022-02-06Jaron WakleyLenovoLaptop


P-1 factor-bounds graph:
B1 = 2000000, B2 = 6017824890 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 400000, B2 = 7500000 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
B1 = 110000, B2 = 2172500 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 25000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
263
262
this exponent TF target: 66
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
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280
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Last modified: 2024-03-13T02:15:48+00:00