is 2 1234841 - 1
has 371725 decimal digits
takes 0.038 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
Actual26724.063068.6567%300000100000000.03684.1766%24.099869.9658%1.3091%
PrimeNet2560.007862.5000%5500900000.00042.4304%0.008263.4114%0.9114%
GPU722600.124465.0000%5000300000.00030.8313%0.124765.2909%0.2909%
Difference+7+23.9386+3.6567%+295000+9970000+0.0366+3.3453%+23.9751+4.6749%+4.6749%

Known prime factors (2 factors, 108.8 bits, 0.00881315% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
123484122839848421276891651.020924809284
22 × 7 × 41 × 805583
-418055830.00030.00200.0036
12348412522963556226110071857.808102157425783
32 × 7 × 1621546441
2015-07-17916215464410.02993.92857.3373

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
123484157624105196610048180345147087282333108.828
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:02:38alpertronManual testing3000001000000012-
skipped known factor: 2283984842127689
--0.037--4.177%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-07-17T10:45:00TJAOIManual testing257258*57.808180.0140.0770.029


ECM factoring results:

Old Calculation Method

Total ECM effort:19.775 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:19.775 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100015.2080.000%
25500001.66718.888%
302500000.13787.162%
3510000000.00999.076%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028110.41
25000035000000449.369


Lucas-Lehmer results:
No L-L results for M1234841


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T17:02:24Oliver KruseGTX-2
2283984842127689
252296355622611007
AA23319E37E71C__no
2017-10-20T02:07:50kkmrkkblmbrbkc4.xlarge
2283984842127689
252296355622611007
AA23319E37E71C__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2021-05-14T12:05:23+00:00