is 2 1704067 - 1
has 512976 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
Actual26717.437168.6567%30000002730000001.20869.5062%18.645671.6363%2.9796%
PrimeNet2570.011363.1579%80001300000.00102.7325%0.012364.1646%1.0067%
GPU722610.180365.5738%70001000000.00081.3020%0.181166.0220%0.4482%
Difference+6+17.2568+3.0829%+2993000+272900000+1.2077+8.2042%+18.4645+5.6143%+5.6143%

Known prime factors (2 factors, 85.1 bits, 0.00499653% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17040671287218130471236.90537769
179 × 211
-1792116.313e-91.233e-52.486e-5
17040673321234489870891548.23997450232
23 × 11 × 1107389
2008-08-261111073892.473e-50.00410.0077

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1704067427515325090409117747501832685.144
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:29:38alpertronManual testing5000001500000012-
skipped known factor: 128721813047
skipped known factor: 332123448987089
--0.088--5.025%
2021-07-16T12:52:32Dylan Delgadolaptop-ryzen737003000000273000000-
skipped known factor: 128721813047
skipped known factor: 332123448987089
--1.209--9.506%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26T20:19:00ANONYMOUSManual testing??48.239152.72440e-60.1745.92001e-6


ECM factoring results:

Old Calculation Method

Total ECM effort:15.280 GHz-days
Estimated T-Level:24.589
DigitsB1CurvesCompleteFacMiss
2011000257 / 1002.5707.555%
2550000257 / 2800.91839.872%

New Calculation Method

Total ECM effort:15.280 GHz-days
Estimated T-Level:24.589
DigitsB1CompleteFacMiss
20110009.8850.005%
25500000.91540.068%
302500000.05894.394%
3510000000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025715.28


Lucas-Lehmer results:
No L-L results for M1704067


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:09alpertronManual testing
128721813047
332123448987089
C43BEC1FD4D661__no
2017-10-18T19:16:38Oliver KruseThreadripper
128721813047
332123448987089
C43BEC1FD4D661__no


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)
100
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107
100
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109
TF factor-bounds graph:
267
2
230
240
250
260
270
280
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2100
Last modified: 2021-07-16T12:52:32+00:00