is 2 1336883 - 1
has 402442 decimal digits
takes 0.051 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
Actual26722.226368.6567%500000150000000.07144.8799%22.297770.1862%1.5295%
PrimeNet2560.007262.5000%60001000000.00062.6080%0.007863.4780%0.9780%
GPU722600.114965.0000%5500400000.00040.9794%0.115365.3428%0.3428%
Difference+7+22.1114+3.6567%+494500+14960000+0.0710+3.9004%+22.1824+4.8434%+4.8434%

Known prime factors (3 factors, 174.3 bits, 0.01304103% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13368832673767721.3501
1
-112.090e-135.536e-81.127e-7
13368833165158280688279127692168.101118378282942048
25 × 3699321341939
2018-06-0232369932134193980.86211,15820,840
1336883358970691515099731168156312684.89213425658472547699805
5 × 7 × 4999 × 5973893 × 12844789
2021-06-265973893128447895,838,9960.35140.6731

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
13368838462895760681058018406308232789.451
13368839598039889402536629062877925197732106.243
13368831136199056773415693554952944362518929752369223947152.993
133688330379315434318853587093458691893391512472030026794
313
53174.343
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:05:10alpertronManual testing5000001500000012-
skipped known factor: 2673767
--0.071--4.880%


Trial Factoring results:
No TF results for M1336883


ECM factoring results:

Old Calculation Method

Total ECM effort:25.253 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000303 / 1003.0304.758%
2550000303 / 2801.08233.821%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.253 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.3280.000%
25500001.36325.599%
302500000.11389.283%
3510000000.00899.235%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025111.72
50000500000020.093
25000035000000318.333
25000035000000195.108


Lucas-Lehmer results:
No L-L results for M1336883


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T05:27:47Oliver KruseGTX-2
2673767
48CA9E0B03D9FB__no
2017-10-24T02:55:47kkmrkkblmbrbkc4.xlarge
2673767
48CA9E0B03D9FB__no
2018-06-04T18:29:03Oliver KruseGTX-2
2673767
316515828068827912769
A781DF1552AB56__no
2018-06-05T11:09:53BattlemaxxWork-3
2673767
316515828068827912769
A781DF1552AB56__no
2021-06-26T13:04:47RichD0Linux-5
2673767
316515828068827912769
35897069151509973116815631
A781DF1552AB56FBno


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
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102
103
104
105
106
107
100
101
102
103
104
105
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109
1010
1011
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1013
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2021-06-26T13:04:47+00:00