is 2 3811387 - 1
has 1147342 decimal digits
takes 0.400 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
Actual2677.796167.1642%1000001303648501.09616.0216%8.892269.1414%1.9772%
PrimeNet2600.040363.3333%170003400000.00533.1895%0.045664.5028%1.1695%
GPU722640.933965.6250%240004500000.00722.1643%0.941166.3690%0.7440%
Difference+3+6.8622+1.5392%+76000+129914850+1.0889+3.8572%+7.9511+2.7724%+2.7724%

Known prime factors (1 factor, 44.2 bits, 0.00115954% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3811387201340939483931444.1952641308
22 × 3 × 53 × 4153
-5341531.053e-64.209e-56.441e-5

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-03-03T20:34:46Jocelyn LaroucheManual testing9000090000-
skipped known factor: 20134093948393
--0.014--0.964%
2022-03-22T11:01:00Jocelyn LaroucheManual testing100000100000-
skipped known factor: 20134093948393
--0.015--1.024%
2022-05-29T20:31:01Jocelyn LaroucheManual testing100000130364850-
skipped known factor: 20134093948393
--1.096--6.022%


Trial Factoring results:
No TF results for M3811387


ECM factoring results:

Old Calculation Method

Total ECM effort:0.450 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.450 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.450


Lucas-Lehmer results:
No L-L results for M3811387


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:21:53kkmrkkblmbrbkManual testing
20134093948393
CC462E6AD94FB0__no
2017-12-11T20:02:56Oliver KruseGTX-3
20134093948393
CC462E6AD94FB0__no


P-1 factor-bounds graph:
B1 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
100
101
102
103
104
105
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2022-05-29T20:31:01+00:00