is 2 1822517 - 1
has 548633 decimal digits
takes 0.099 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
Actual26716.303868.6567%500000150000000.10155.0661%16.405370.2446%1.5879%
PrimeNet2570.010563.1579%80001500000.00122.8769%0.011864.2178%1.0599%
GPU722610.168565.5738%90001300000.00121.5583%0.169866.1102%0.5365%
Difference+6+16.1352+3.0829%+491000+14870000+0.1002+3.5078%+16.2355+4.1343%+4.1343%

Known prime factors (2 factors, 58.8 bits, 0.00322756% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1822517142156327927.08339
3 × 13
-3139.894e-122.788e-74.803e-7
182251735867134571031.740984
23 × 3 × 41
2008-07-158411.904e-107.707e-71.281e-6

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
18225175098740110485924391858.823
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:38:20alpertronManual testing5000001500000012-
skipped known factor: 142156327
skipped known factor: 3586713457
--0.101--5.066%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:47:00J FeitsmaManual testing??31.740103.34330e-110.2127.15581e-11


ECM factoring results:

Old Calculation Method

Total ECM effort:20.266 GHz-days
Estimated T-Level:24.732
DigitsB1CurvesCompleteFacMiss
2011000265 / 1002.6506.972%
2550000265 / 2800.94638.747%

New Calculation Method

Total ECM effort:20.266 GHz-days
Estimated T-Level:24.732
DigitsB1CompleteFacMiss
201100010.9130.002%
25500001.00436.632%
302500000.06493.827%
3510000000.00399.701%


ECM Summary

B1B2factorcurvesGHz-days
50000485000070.477
500005000000332.278
50000660000022517.51


Lucas-Lehmer results:
No L-L results for M1822517


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T23:44:18Oliver KruseGTX-3
142156327
3586713457
D53E32BD9C0993__no
2017-11-11T02:30:03kkmrkkblmbrbkc4.xlarge
142156327
3586713457
D53E32BD9C0993__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2021-03-19T18:35:20+00:00