is 2 3881093 - 1
has 1168326 decimal digits
takes 0.484 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
Actual26815.357867.6471%5000001303648501.37007.1342%16.727769.9552%2.3081%
PrimeNet2600.039663.3333%170003600000.00653.2450%0.046064.5232%1.1898%
GPU722640.917165.6250%240005000000.00902.2314%0.926166.3921%0.7671%
Difference+4+14.4407+2.0221%+476000+129864850+1.3610+4.9027%+15.8016+3.5631%+3.5631%

Known prime factors (2 factors, 113.9 bits, 0.00293469% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3881093198838873341111444.1772561635
5 × 541 × 947
-5419478.855e-70.00010.0002
38810939733758760037749977772169.722125399710339816
23 × 11 × 751 × 787 × 2411011
2018-11-20787241101156.8740.02390.0444

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
38810931935449625220066093672038748127124735113.898
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-17T22:55:05Jocelyn LaroucheManual testing200000200000-
skipped known factor: 19883887334111
--0.036--1.299%
2022-05-16T19:05:00Jocelyn LaroucheManual testing500000130364850-
skipped known factor: 19883887334111
skipped known factor: 973375876003774997777
--1.370--7.134%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2022-03-16T19:11:58Jocelyn LaroucheManual testing267268--7.702--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.536 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.536 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.536


Lucas-Lehmer results:
No L-L results for M3881093


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T16:57:29kkmrkkblmbrbkManual testing
19883887334111
2AF0901CD2F99E__no
2017-12-26T22:34:29Oliver KruseGTX-4
19883887334111
2AF0901CD2F99E__no
2018-11-20T19:46:13rucio
19883887334111
973375876003774997777
15EEA640B459E6__no
2018-11-21T12:02:23kkmrkkblmbrbkc5d.large
19883887334111
973375876003774997777
15EEA640B459E6__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 130364850 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
268
240
250
260
270
280
290
2100
Last modified: 2022-05-16T19:05:00+00:00