is 2 1817177 - 1
has 547025 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
Actual26716.351768.6567%500000150000000.10155.0643%16.453270.2440%1.5873%
PrimeNet2570.010663.1579%80001500000.00122.8753%0.011864.2172%1.0593%
GPU722610.169065.5738%90001300000.00121.5574%0.170366.1099%0.5361%
Difference+6+16.1826+3.0829%+491000+14870000+0.1002+3.5069%+16.2829+4.1341%+4.1341%

Known prime factors (3 factors, 137.7 bits, 0.00757669% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
181717725440479824.6017
7
-171.232e-121.044e-71.601e-7
181717769052727826.04119
19
2008-07-151194.940e-121.558e-71.601e-7
18171771591015172528236129546898872787.04043777110664735359559
111577 × 392348877140767
2020-06-1311157739234887714076726,279,1631,681,5093,140,591

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
181717717567344511362331650.642
1817177404761880853859681607791602173587334111.641
18171771098639363614501892451386413667184935113.081
181717727949911658608099490369754577785330437567142137.682
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:37:38alpertronManual testing5000001500000012-
skipped known factor: 25440479
skipped known factor: 69052727
--0.101--5.064%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:46:00J FeitsmaManual testing??26.04182.02329e-140.2114.33200e-14


ECM factoring results:

Old Calculation Method

Total ECM effort:18.088 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:18.088 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.3040.025%
25500000.75147.177%
302500000.04695.470%
3510000000.00299.788%


ECM Summary

B1B2factorcurvesGHz-days
500005000000100.690
50000500000014810.21
500006500000937.184


Lucas-Lehmer results:
No L-L results for M1817177


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T22:25:41Oliver KruseGTX-2
25440479
69052727
7B7E956B9CCB0E__no
2017-11-05T22:03:58kkmrkkblmbrbkc4.xlarge
25440479
69052727
7B7E956B9CCB0E__no
2020-06-13T18:37:17CrypticCluecruncher
25440479
69052727
159101517252823612954689887
41C709BA2F21ABACno
2020-06-15T00:43:11Team_InspectorSpudBoy4
25440479
69052727
159101517252823612954689887
41C709BA2F21ABACno


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:
267
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Last modified: 2021-03-12T16:34:57+00:00