is 2 1749359 - 1
has 526610 decimal digits
takes 0.095 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
Actual26716.985668.6567%500000150000000.10155.0411%17.087170.2368%1.5801%
PrimeNet2570.011063.1579%80001400000.00122.8023%0.012264.1903%1.0324%
GPU722610.175665.5738%80001100000.00111.4126%0.176766.0601%0.4863%
Difference+6+16.8100+3.0829%+492000+14890000+0.1004+3.6286%+16.9104+4.1767%+4.1767%

Known prime factors (2 factors, 107.2 bits, 0.00613002% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
174935915190873761131340.466434184
23 × 3 × 79 × 229
-792291.657e-76.857e-61.265e-5
17493591258028254026988308072166.77035956834875717
3 × 7 × 1712230232177
2020-06-067171223023217714.5397,338.213,706

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
174935919110548394858762947937856031319133107.236
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:35:28alpertronManual testing5000001500000012-
skipped known factor: 1519087376113
--0.101--5.041%


Trial Factoring results:
No TF results for M1749359


ECM factoring results:

Old Calculation Method

Total ECM effort:17.869 GHz-days
Estimated T-Level:24.643
DigitsB1CurvesCompleteFacMiss
2011000260 / 1002.6007.331%
2550000260 / 2800.92939.446%

New Calculation Method

Total ECM effort:17.869 GHz-days
Estimated T-Level:24.643
DigitsB1CompleteFacMiss
20110008.3870.023%
25500000.75846.859%
302500000.04795.439%
3510000000.00299.786%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025717.66
50000500000030.206


Lucas-Lehmer results:
No L-L results for M1749359


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T06:12:57Oliver KruseGTX-2
1519087376113
DE509FC8D623ED__no
2017-11-03T19:18:51kkmrkkblmbrbkc4.xlarge
1519087376113
DE509FC8D623ED__no
2020-06-06T11:47:22CrypticCluecruncher
1519087376113
125802825402698830807
8F9C9C92AAE358ACno
2020-06-10T06:46:39Team_InspectorSpudBoy4
1519087376113
125802825402698830807
8F9C9C92AAE358ACno


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-08-14T09:31:12+00:00