is 2 1800803 - 1
has 542096 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
Actual26716.500468.6567%500000150000000.10155.0588%16.601870.2423%1.5856%
PrimeNet2570.010763.1579%80001500000.00122.8704%0.011964.2154%1.0575%
GPU722610.170665.5738%90001300000.00121.5545%0.171866.1089%0.5352%
Difference+6+16.3298+3.0829%+491000+14870000+0.1002+3.5043%+16.4300+4.1334%+4.1334%

Known prime factors (2 factors, 93.7 bits, 0.00520474% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
18008033601607721.7801
1
-111.552e-137.866e-81.601e-7
180080345516842495368603122412271.9471263792943908040
23 × 5 × 7 × 13 × 173 × 2006912507
2020-06-291732006912507305.728.601116.065

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1800803163933778549217028585893712872993.727
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:35:43alpertronManual testing5000001500000012-
skipped known factor: 3601607
--0.101--5.059%


Trial Factoring results:
No TF results for M1800803


ECM factoring results:

Old Calculation Method

Total ECM effort:17.788 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:17.788 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.3230.024%
25500000.75247.133%
302500000.04695.474%
3510000000.00299.788%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025717.72
50000500000010.069


Lucas-Lehmer results:
No L-L results for M1800803


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T18:38:54Oliver KruseGTX-3
3601607
348D14320924D4__no
2017-11-05T11:23:56ATHec2-1xf
3601607
348D14320924D4__no
2020-06-29T21:06:30CrypticClueManual testing
3601607
4551684249536860312241
79ED9B22D4CCE41Dno
2020-07-01T20:13:29daveward2005Davy
3601607
4551684249536860312241
79ED9B22D4CCE41Dno


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
109
1010
TF factor-bounds graph:
267
220
230
240
250
260
270
280
290
2100
Last modified: 2021-01-29T12:54:29+00:00