is 2 3838777 - 1
has 1155588 decimal digits
takes 0.403 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.740567.1642 %1000001303648501.09616.0272 %8.836569.1432 %
Target2640.927265.6250 %2400025000000.02422.2272 %0.951466.3906 %
Difference+3+6.8133+1.5392 %+76000+127864850+1.0719+3.8000%+7.8851+2.7527 %

Known prime factors (1 factor, 41.8 bits, 0.00108814% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
383877737532413708871341.771488859
3 × 7 × 23279
-7232791.384e-70.00020.0004

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-03-03JossManual testing9000090000
skipped known factor: 3753241370887
--0.0141.467%
2022-03-22JossManual testing100000100000
skipped known factor: 3753241370887
--0.0151.549%
2022-05-30JossManual testing100000130364850
skipped known factor: 3753241370887
--1.3028.141%


Trial Factoring results:
5758596061626364656667
No TF results for M3838777


ECM factoring results:
Total ECM effort:0.451 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.451


Lucas-Lehmer results:
No L-L results for M3838777


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
3753241370887
9CC46E979167667C
2017-12-18Oliver KruseGTX-1
3753241370887
9CC46E979167667C


CERT results:
No CERT results for M3838777


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:
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00