is 2 1747433 - 1
has 526030 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
Actual26717.004368.6567%500000150000000.10155.0404%17.105870.2366%1.5798%
PrimeNet2570.011063.1579%80001400000.00122.8017%0.012264.1901%1.0322%
GPU722610.175865.5738%80001100000.00111.4122%0.176966.0599%0.4862%
Difference+6+16.8285+3.0829%+492000+14890000+0.1004+3.6282%+16.9289+4.1766%+4.1766%

Known prime factors (2 factors, 130.1 bits, 0.00744486% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1747433131140932400091443.5763752388
22 × 32 × 104233
-91042338.082e-70.00040.0008
17474331107741308194729172620845832786.51831696245526859375227
46523 × 681302700317249
2020-06-014652368130270031724915,387,7852,919,8935,453,547

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1747433145270228014752241180715799448387768124740130.094
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:35:11alpertronManual testing5000001500000012-
skipped known factor: 13114093240009
--0.101--5.040%


Trial Factoring results:
No TF results for M1747433


ECM factoring results:

Old Calculation Method

Total ECM effort:17.867 GHz-days
Estimated T-Level:24.643
DigitsB1CurvesCompleteFacMiss
2011000260 / 1002.6007.331%
2550000260 / 2800.92939.446%

New Calculation Method

Total ECM effort:17.867 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 M1747433


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T05:49:21Oliver KruseGTX-2
13114093240009
81C509787B6589__no
2017-11-03T19:00:04srow7sys2b
13114093240009
81C509787B6589__no
2020-06-03T18:08:12mnd950871
13114093240009
110774130819472917262084583
147FDDB69AA06FB0no
2020-06-05T01:20:36Luigi Morelli9800X
13114093240009
110774130819472917262084583
147FDDB69AA06FB0no


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: 2020-07-27T10:58:45+00:00