is 2 1831267 - 1
has 551267 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
Actual26716.225968.6567%500000150000000.10155.0690%16.327470.2455%1.5888%
PrimeNet2570.010563.1579%80001500000.00122.8795%0.011764.2188%1.0609%
GPU722610.167765.5738%90001400000.00131.5948%0.169066.1228%0.5490%
Difference+6+16.0581+3.0829%+491000+14860000+0.1002+3.4742%+16.1583+4.1227%+4.1227%

Known prime factors (3 factors, 122.1 bits, 0.00666629% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
183126729300273824.8048
23
-881.223e-126.293e-71.281e-6
183126762263079825.89217
17
2008-07-151172.450e-121.472e-71.601e-7
183126730754232056070861649912271.381839698199554485
3 × 5 × 19 × 29 × 37 × 53 × 51808709
2020-05-245351808709372.140.22200.4147

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
183126718243252125205671650.696
1831267901107395148227553687593425432996.186
18312671914853180091472488506416672893097.273
1831267561057209315983088852273707674286989737122.078
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:39:31alpertronManual testing5000001500000012-
skipped known factor: 29300273
skipped known factor: 62263079
--0.101--5.069%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:47:00J FeitsmaManual testing??25.89288.98191e-150.2131.92138e-14


ECM factoring results:

Old Calculation Method

Total ECM effort:19.806 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:19.806 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110008.8230.015%
25500000.80044.950%
302500000.04995.173%
3510000000.00299.773%


ECM Summary

B1B2factorcurvesGHz-days
500005000000211.451
500005000000120.829
50000660000021816.98
50000675000070.551


Lucas-Lehmer results:
No L-L results for M1831267


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T01:57:27Oliver KruseGTX-1
29300273
62263079
E9790DF43172F4__no
2017-11-06T07:34:53ATHec2-1xf
29300273
62263079
E9790DF43172F4__no
2020-05-25T01:45:51CrypticCluecruncher
29300273
62263079
3075423205607086164991
95B769A124057C6Ano
2020-05-25T23:38:12marssystemssystem03
29300273
62263079
3075423205607086164991
95B769A124057C6Ano


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: 2021-05-07T10:27:21+00:00