is 2 1707983 - 1
has 514155 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
Actual26717.397168.6567%30000002730000001.20869.5082%18.605671.6369%2.9802%
PrimeNet2570.011263.1579%80001400000.00102.7896%0.012364.1856%1.0277%
GPU722610.179865.5738%70001000000.00081.3026%0.180766.0222%0.4484%
Difference+6+17.2172+3.0829%+2993000+272900000+1.2077+8.2056%+18.4250+5.6147%+5.6147%

Known prime factors (2 factors, 89.6 bits, 0.00524743% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17079833415967721.7041
1
-111.636e-136.824e-81.389e-7
17079832794960932953798739432167.92181820513815237
32 × 9091168201693
2019-05-139909116820169323.97733,80063,130

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
17079839547494313259389018534478812789.625
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:29:58alpertronManual testing5000001500000012-
skipped known factor: 3415967
--0.088--5.027%
2021-07-17T13:23:32Dylan Delgadolaptop-ryzen737003000000273000000-
skipped known factor: 3415967
--1.209--9.508%


Trial Factoring results:
No TF results for M1707983


ECM factoring results:

Old Calculation Method

Total ECM effort:15.997 GHz-days
Estimated T-Level:24.804
DigitsB1CurvesCompleteFacMiss
2011000269 / 1002.6906.697%
2550000269 / 2800.96138.196%

New Calculation Method

Total ECM effort:15.997 GHz-days
Estimated T-Level:24.804
DigitsB1CompleteFacMiss
20110008.6770.017%
25500000.78445.646%
302500000.04895.285%
3510000000.00299.779%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026615.82
50000500000030.178


Lucas-Lehmer results:
No L-L results for M1707983


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:18alpertronManual testing
3415967
E3DA3F68EE1121__no
2017-10-18T21:02:03Oliver KruseThreadripper
3415967
E3DA3F68EE1121__no
2019-05-15T04:33:27_p95holder_TFL17_PRPt15-E_g
3415967
279496093295379873943
AB2024CC9DC76DD0no
2019-05-15T09:21:36francijezekstacF
3415967
279496093295379873943
AB2024CC9DC76DD0no
2019-05-16T04:04:53kkmrkkblmbrbkc5.large
3415967
279496093295379873943
AB2024CC9DC76DD0no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 273000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
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: 2021-07-17T13:23:32+00:00