is 2 3838801 - 1
has 1155595 decimal digits
takes 0.403 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
Actual26815.527067.6471%10000001303648501.22577.7449%16.752670.1528%2.5057%
PrimeNet2600.040063.3333%170003400000.00533.1934%0.045364.5043%1.1709%
GPU722640.927265.6250%240005000000.00762.2272%0.934866.3906%0.7656%
Difference+4+14.5998+2.0221%+976000+129864850+1.2181+5.5178%+15.8178+3.7622%+3.7622%

Known prime factors (4 factors, 202.1 bits, 0.00526407% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3838801391557703928.54551
3 × 17
-3179.418e-125.730e-79.298e-7
38388015062803543386231548.84765942511
3 × 21980837
2008-09-073219808371.241e-50.18240.3406
3838801251926950600987911754.4843281323395
3 × 5 × 7 × 31250699
2014-11-257312506990.00070.25930.4843
383880113577318618949108734472270.202176843220304323
3 × 137 × 334771 × 1285283
2022-04-223347711285283101.120.05890.1038

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
38388011982379726188573060629692477.392
383880198643938101117295570370732583.029
38388015316303691334845289966310122413098.746
38388011275456658177169316178784690479332103.331
383880168739296813699382407763676493724348136119.049
38388013420492477009865508899698221191870257738124.686
3838801499414879351908584485045670735640677047940131.875
383880126915401166207349108102554534717799657208414345147.593
38388011339320177426763247003691892883074640379030063147153.230
383880117317281432731489953806410541383328867450819080731
471
53173.532
383880167807149400048912220800142182590426938326341847197
86344571113
61202.077
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-04-18T19:54:31Jocelyn LaroucheManual testing300000300000-
skipped known factor: 391557703
--0.046--1.579%
2022-04-22T23:32:55Jocelyn LaroucheManual testing10000001303648502270.2021.2260.8062.4517.745%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-07T21:12:00Will EdgingtonManual testing??48.847152.64498e-60.8605.64076e-6
2014-11-25T12:34:00TJAOIManual testing254255*54.484179.94565e-50.8590.000
2022-08-10T07:41:22LordJuliusManual testing2126254.484170.0010.8590.002
2022-08-10T07:41:22LordJuliusManual testing2126228.54599.41837e-120.8602.00863e-11
2022-08-10T07:41:22LordJuliusManual testing2126248.847151.24130e-50.8602.64723e-5
2022-08-10T07:41:22LordJuliusManual testing262263--0.256--
2022-08-10T07:41:22LordJuliusManual testing263264--0.511--
2022-08-10T07:41:22LordJuliusManual testing264265--0.973--
2022-08-10T07:41:22LordJuliusManual testing265266--1.947--
2022-08-10T07:41:22LordJuliusManual testing266267--3.893--
2022-03-05T00:35:35Jocelyn LaroucheManual testing267268--7.787--
2022-08-10T07:41:22LordJuliusManual testing267268--7.787--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.451 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.451 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.451


Lucas-Lehmer results:
No L-L results for M3838801


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-11T21:01:03kkmrkkblmbrbkc4.xlarge
391557703
506280354338623
25192695060098791
0A1536408955F6__no
2017-12-18T06:10:30Oliver KruseGTX-2
391557703
506280354338623
25192695060098791
0A1536408955F6__no
2022-04-23T00:56:01aperson12012_VP113
391557703
506280354338623
25192695060098791
1357731861894910873447
0A1536408955F633no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 130364850 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 300000 (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:
268
267
266
265
264
263
262
255
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-08-10T07:41:22+00:00