is 2 1789373 - 1
has 538655 decimal digits
takes 0.097 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
Actual26716.605868.6567%500000150000000.10155.0549%16.707270.2411%1.5844%
PrimeNet2570.010763.1579%80001400000.00122.8143%0.011964.1947%1.0368%
GPU722610.171765.5738%80001300000.00121.4933%0.172866.0878%0.5141%
Difference+6+16.4341+3.0829%+492000+14870000+0.1003+3.5616%+16.5344+4.1532%+4.1532%

Known prime factors (2 factors, 115.5 bits, 0.00645488% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17893733313866796820631548.23692598547
92598547
-1925985474.140e-50.39690.7412
17893731774916894788739693992167.26649596056685463
49596056685463
2017-12-1314959605668546327.392212,556396,996

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
17893735881838164756379957971145211119013735115.502
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:34:18alpertronManual testing5000001500000012---0.101--5.055%


Trial Factoring results:
No TF results for M1789373


ECM factoring results:

Old Calculation Method

Total ECM effort:18.258 GHz-days
Estimated T-Level:24.732
DigitsB1CurvesCompleteFacMiss
2011000265 / 1002.6506.972%
2550000265 / 2800.94638.747%

New Calculation Method

Total ECM effort:18.258 GHz-days
Estimated T-Level:24.732
DigitsB1CompleteFacMiss
201100010.1920.004%
25500000.94338.943%
302500000.05994.225%
3510000000.00399.722%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026418.19
50000500000010.069


Lucas-Lehmer results:
No L-L results for M1789373


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T16:01:45Oliver KruseGTX-1
331386679682063
8EB3DEF7D340DE__no
2017-11-05T04:33:16kkmrkkblmbrbkc4.xlarge
331386679682063
8EB3DEF7D340DE__no
2017-12-14T08:15:33Luigi MorelliAWS_01
331386679682063
177491689478873969399
070C2B33E17FCC__no
2017-12-14T15:45:55kkmrkkblmbrbkc4.xlarge
331386679682063
177491689478873969399
070C2B33E17FCC__no


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: 2021-01-29T12:53:56+00:00