is 2 1694621 - 1
has 510132 decimal digits
takes 0.080 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
Actual26717.534368.6567%500000150000000.08805.0218%17.622370.2307%1.5740%
PrimeNet2570.011363.1579%80001300000.00102.7297%0.012364.1636%1.0057%
GPU722610.181365.5738%70001000000.00081.3004%0.182166.0215%0.4477%
Difference+6+17.3530+3.0829%+493000+14900000+0.0872+3.7214%+17.4402+4.2093%+4.2093%

Known prime factors (3 factors, 186.6 bits, 0.01101108% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1694621352816669065591445.00410409899
17 × 113 × 5419
-11354193.388e-62.744e-53.763e-5
1694621216608954151377475832064.2326391073701771
11 × 646003 × 899387
2017-08-176460038993872.31560.04500.0897
16946211939985206287799142082072477.36057239500935247443
32 × 6359944548360827
2018-03-039635994454836082730,27123,645,87644,163,912

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
169462176423249693470104086757458909689733109.236
1694621684459118518982778330870407753992971337122.364
1694621420218166603144458803883443509203287301368143141.592
169462114825997382177058242849412585611348972928733579895
5633679
57186.596
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:18:50alpertronManual testing5000001500000012-
skipped known factor: 35281666906559
--0.088--5.022%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2017-08-17T11:41:06TJAOIManual testing264265*64.232200.2150.1620.438


ECM factoring results:

Old Calculation Method

Total ECM effort:15.093 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:15.093 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025214.97
50000500000020.119


Lucas-Lehmer results:
No L-L results for M1694621


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T13:10:04alpertronManual testing
35281666906559
21660895415137747583
A0C57EDC9E3E5C__no
2017-10-18T15:15:59Oliver KruseThreadripper
35281666906559
21660895415137747583
A0C57EDC9E3E5C__no
2018-03-08T11:26:25treborDesktop
35281666906559
21660895415137747583
193998520628779914208207
C0087C8FB7F21E__no
2018-03-11T16:39:31Oliver KruseGTX-6
35281666906559
21660895415137747583
193998520628779914208207
C0087C8FB7F21E__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: 2020-02-03T10:37:34+00:00