is 2 1803533 - 1
has 542918 decimal digits
takes 0.098 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
Actual26716.475468.6567%500000150000000.10155.0597%16.576970.2426%1.5859%
PrimeNet2570.010663.1579%80001500000.00122.8712%0.011964.2157%1.0578%
GPU722610.170365.5738%90001300000.00121.5550%0.171566.1091%0.5353%
Difference+6+16.3051+3.0829%+491000+14870000+0.1002+3.5047%+16.4053+4.1335%+4.1335%

Known prime factors (2 factors, 101.6 bits, 0.00563271% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
180353316989280871030.662471
3 × 157
-31578.740e-118.960e-71.268e-6
180353322429268636969659310812270.926621814755731380
22 × 5 × 31090737786569
2020-06-07531090737786569264.50133,247248,869

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1803533381057144582159607699561717204731101.588
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:36:06alpertronManual testing5000001500000012-
skipped known factor: 1698928087
--0.101--5.060%


Trial Factoring results:
No TF results for M1803533


ECM factoring results:

Old Calculation Method

Total ECM effort:17.858 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:17.858 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.3380.024%
25500000.75447.051%
302500000.04695.463%
3510000000.00299.788%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024817.10
50000500000030.207
50000675000070.550


Lucas-Lehmer results:
No L-L results for M1803533


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T19:13:29Oliver KruseGTX-3
1698928087
127178FAB358DC__no
2017-11-05T16:40:58Chang Chia-Tcheexbpc13
1698928087
127178FAB358DC__no
2020-06-07T18:12:17pew10980xe_1
1698928087
2242926863696965931081
EF7F4E33DB0723F0no
2020-06-09T01:15:25Luigi Morelli9800X
1698928087
2242926863696965931081
EF7F4E33DB0723F0no


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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Last modified: 2021-01-29T12:55:20+00:00