is 2 3752219 - 1
has 1129531 decimal digits
takes 0.394 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
Actual2677.919067.1642 %2000001303648501.11056.8109 %9.029569.4006 %
Target2640.948665.6250 %2200022500000.02182.1109 %0.970466.3506 %
Difference+3+6.9704+1.5392 %+178000+128114850+1.0886+4.7000%+8.0591+3.0500 %

Known prime factors (3 factors, 118.5 bits, 0.00315817% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
37522197504439722.8391
1
-111.489e-131.523e-73.099e-7
3752219157593199927.23221
3 × 7
2008-09-07374.787e-124.901e-79.298e-7
37522193977977693362669534732168.43153008335778944
27 × 3 × 7 × 13 × 53 × 28621717
2022-05-241282862171716.1750.23750.4435

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-04-16JossManual testing200000200000
skipped known factor: 7504439
skipped known factor: 157593199
--0.0302.147%
2022-05-24JossManual testing20000013036485022168.4311.3199.019%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-07Will EdgingtonManual testing??
27.232
9


ECM factoring results:
Total ECM effort:0.448 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.448


Lucas-Lehmer results:
No L-L results for M3752219


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
157593199
7504439
6566D97F5CD17F0A
2017-12-04Oliver KruseThreadripper-PC
7504439
157593199
6566D97F5CD17F0A
2022-05-31XZT800G2Mini3
7504439
157593199
397797769336266953473
1762D425654ABB3B


CERT results:
dateuseridcompid
2022-06-01curtiscjckl3e14025l


P-1 factor-bounds graph:
B1 = 200000, B2 = 130364850 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
100
101
102
103
104
105
106
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