is 2 1828793 - 1
has 550522 decimal digits
takes 0.099 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1579DB8C60832D85double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.247868.6567%500000150000000.10155.0682%16.349370.2452%1.5885%
PrimeNet2570.010563.1579%80001500000.00122.8787%0.011764.2185%1.0606%
GPU722610.168065.5738%90001400000.00131.5944%0.169266.1227%0.5489%
Difference+6+16.0799+3.0829%+491000+14860000+0.1002+3.4738%+16.1801+4.1226%+4.1226%

Known prime factors (2 factors, 132.2 bits, 0.00722721% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
182879318469690073819410631960.680504969399867
3 × 168323133289
2008-10-0131683231332890.1597721.391,347.4
182879333179724946250549618392271.491907148183152783
11 × 13 × 6343693588481
2020-11-28136343693588481481.2127,18750,779

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1828793612819236491822054179005600243121209485740132.171
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:39:13alpertronManual testing5000001500000012---0.101--5.068%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers21258--0.021--


ECM factoring results:

Old Calculation Method

Total ECM effort:20.418 GHz-days
Estimated T-Level:24.768
DigitsB1CurvesCompleteFacMiss
2011000267 / 1002.6706.833%
2550000267 / 2800.95438.471%

New Calculation Method

Total ECM effort:20.418 GHz-days
Estimated T-Level:24.768
DigitsB1CompleteFacMiss
20110009.1130.011%
25500000.82643.798%
302500000.05195.021%
3510000000.00299.765%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000402.763
50000500000020.138
50000660000022517.52


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-26T00:00:00ANONYMOUSv4_computers1579DB8C60832D850.099


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T01:17:56Oliver KruseGTX-1
1846969007381941063
3EB1B71142886C__no
2017-11-06T09:47:11bayanneiMac1
1846969007381941063
3EB1B71142886C__no
2020-11-29T02:16:43oodairacom1
1846969007381941063
3317972494625054961839
ACB66F900DBB96C1no


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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2100
Last modified: 2021-04-16T16:25:17+00:00