is 2 9874451 - 1
has 2972506 decimal digits
takes 2.880 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRPA3A36052EF03EB__
unverified PRP test

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.009264.1791%----3.009264.1791%0.0000%
PrimeNet2640.360562.5000%4500012000000.04563.6719%0.406163.8770%1.3770%
GPU722686.036364.7059%6500015000000.06062.5628%6.096865.6104%0.9045%
Difference-1-3.0271-0.5268%-65000-1500000-0.0606-2.5628%-3.0877-1.4313%-0.9045%

Known prime factors (2 factors, 112.0 bits, 0.00113455% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
9874451221005222545531444.3291119076
22 × 7 × 17 × 2351
-1723512.906e-76.097e-50.0001
98744512400214234912182465432167.70212153659149821
3 × 7 × 600043 × 964507
2022-08-076000439645074.94930.26220.5165

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
9874451530459881143715907848507375826027934112.031
P-1 results:
No P-1 results for M9874451


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-07T09:49:06riccardo ubertiColab_noGPU152000000200000027P-12167.7021.286
2022-08-09T02:27:27riccardo ubertiColab_noGPU1523000006000000065--2.781


Trial Factoring results:
No TF results for M9874451


ECM factoring results:
Total ECM effort:17.168 GHz-days
Estimated T-Level:20.483
DigitsB1CompleteFacMiss
20110001.00036.788%
25500000.09790.790%
302500000.00699.377%


ECM Summary

B1B2factorcurvesGHz-days
50000144000002017.17


Lucas-Lehmer results:
No L-L results for M9874451


PRP results:
dateuseridcompidcofactorsres64PRP
2020-09-13T10:44:14riccardo ubertiNomad2C
22100522254553
A3A36052EF03EB__no
2021-02-10T02:51:51Oliver KruseIOS-5
22100522254553
A3A36052EF03EB46no
2022-08-08T14:28:34riccardo ubertiNomad2C
22100522254553
240021423491218246543
A3A36052EF03EB46no


P-1 factor-bounds graph:
B1 = 2000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2022-08-09T13:28:18+00:00