is 2 9875087 - 1
has 2972698 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-
PRPC75F5CE0E7759B__
unverified PRP test

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.009064.1791%----3.009064.1791%0.0000%
PrimeNet2640.360462.5000%4500012000000.04563.6719%0.406163.8770%1.3770%
GPU722686.035964.7059%6500015000000.06062.5628%6.096465.6104%0.9045%
Difference-1-3.0269-0.5268%-65000-1500000-0.0606-2.5628%-3.0875-1.4313%-0.9045%

Known prime factors (3 factors, 152.9 bits, 0.00154813% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
987508755300487211032.365280
23 × 5 × 7
-886.145e-113.383e-66.886e-6
98750874413176380311238.68322345
5 × 41 × 109
2008-09-08411096.810e-91.891e-53.529e-5
987508743022297255921165991882072581.831217832497353801369
32 × 13 × 61 × 24179 × 1262317603
2022-08-1924179126231760374,80829.09654.324

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
987508724405080397480725083512271.048
98750872379153999145886536702361375863324735114.196
9875087189864986076507017046768784526990041737120.514
98750871049962623415070437767008914056205870082821665747152.879
P-1 results:
No P-1 results for M9875087


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-15T08:39:59riccardo ubertiColab_noGPU1520000005000000027--2.370
2022-08-19T11:15:39riccardo ubertiColab_noGPU1523000006000000065P+12581.8312.781


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-08T05:37:00Will EdgingtonManual testing??38.683123.10220e-96.2176.69590e-9


ECM factoring results:
Total ECM effort:8.584 GHz-days
Estimated T-Level:2.500
DigitsB1CompleteFacMiss
20110000.50060.653%
25500000.04895.284%
302500000.00399.688%


ECM Summary

B1B2factorcurvesGHz-days
5000014400000108.584


Lucas-Lehmer results:
No L-L results for M9875087


PRP results:
dateuseridcompidcofactorsres64PRP
2020-09-16T16:23:21riccardo ubertiNomad2C
5530048721
441317638031
C75F5CE0E7759B__no
2021-02-10T12:41:51Oliver KruseIOS-5
5530048721
441317638031
C75F5CE0E7759B4Dno
2022-08-19T21:21:05riccardo ubertiNomad2C
5530048721
441317638031
4302229725592116599188207
C75F5CE0E7759B4Dno


P-1 factor-bounds graph:
B1 = 2300000, B2 = 60000000 (P+1 stage 2)
B1 = 2300000 (P+1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
2
230
240
250
260
270
280
290
2100
Last modified: 2022-08-19T21:21:05+00:00