is 2 1986631 - 1
has 598036 decimal digits
takes 0.131 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.956968.6567%----14.956968.6567%0.0000%
PrimeNet2580.019363.7931%80001400000.00142.4756%0.020864.6895%0.8964%
GPU722620.309266.1290%80001000000.00121.1980%0.310566.5348%0.4058%
Difference+5+14.6477+2.5277%-8000-100000-0.0012-1.1980%+14.6465+2.1219%+2.1219%

Known prime factors (2 factors, 104.4 bits, 0.00525462% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1986631401299462011135.22410100
22 × 52 × 101
-251012.733e-92.778e-64.851e-6
19866316622656094590853627912169.166166680578693045
5 × 113 × 6679 × 44169767
2021-04-2766794416976769.5400.23000.4285

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
19866312657668327836557231946939720699132104.390
P-1 results:
No P-1 results for M1986631


Trial Factoring results:
No TF results for M1986631


ECM factoring results:

Old Calculation Method

Total ECM effort:3.585 GHz-days
Estimated T-Level:1.900
DigitsB1CurvesCompleteFacMiss
201100038 / 1000.38068.255%
255000038 / 2800.13687.288%

New Calculation Method

Total ECM effort:3.585 GHz-days
Estimated T-Level:1.900
DigitsB1CompleteFacMiss
20110001.30627.104%
25500000.12188.635%
302500000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
500005000000201.690
50000675000070.675
50000675000020.193
50000703457170.689
1000001000000020.338


Lucas-Lehmer results:
No L-L results for M1986631


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T14:40:19Oliver KruseGTX-2
40129946201
28EB2233FF8EBC__no
2017-11-12T17:19:27kkmrkkblmbrbkc4.xlarge
40129946201
28EB2233FF8EBC__no
2021-04-27T14:14:52mrhw
40129946201
662265609459085362791
6D7B64817FB638DEno


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2022-05-12T12:19:15+00:00