is 2 285151 - 1
has 85840 decimal digits
takes 0.002 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
Actual267104.204171.6418%50000500000.00050.3947%104.204671.7537%0.1119%
PrimeNet2400.000052.5000%3000800000.000115.0495%0.000159.6485%7.1485%
GPU722440.000056.8182%50001300000.000110.8685%0.000161.5114%4.6932%
Difference+23+104.2041+14.8236%+45000-80000+0.0004-10.4738%+104.2045+10.2423%+10.2423%

Known prime factors (5 factors, 230.5 bits, 0.08083109% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
28515188967113826.407156
22 × 3 × 13
-4133.241e-114.449e-88.066e-8
28515122926140411031.0944020
22 × 3 × 5 × 67
2008-07-215671.876e-98.301e-81.008e-7
285151523223569911135.60791745
5 × 59 × 311
2008-07-21593112.983e-87.206e-71.190e-6
28515159918610387178491652.41210506470324
22 × 7 × 109 × 3442487
2014-08-0810934424870.00370.00190.0035
285151379131607063231985401707772684.97166479094771407427188
22 × 16619773692851856797
2020-07-0541661977369285185679717,867,4608.972e+91.676e+10

26 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2851512039672524510336331857.501
28515146549690468446369831962.013
2851511199549702957811106312166.701
2851515330785781119082470999372478.819
285151137370247490853852547178092683.506
2851513135082923082593683016323592788.019
285151106720473972164014927736783032993.108
285151122214343313567611660501309641541734109.913
285151337302445274661581904480855665680134111.378
2851512789192766822594205299994416760956735114.425
2851518692024457400604245722622588807985735116.065
28515171875351291584772803811266946335271936119.113
285151198370592913339610504378544829985200737120.578
28515122717039049086645806826115832134957809867342137.383
285151773304322100323244197484330514832599074284143142.472
2851516394542500273118431116003817087775071013024744145.520
28515117648458955598084335119032992664859139004579145146.984
285151454787206634617487243809343856372028947023028746151.672
2851512021069380105504164286875218588639822720696594104950163.790
28515152081402693881332402323326802245003281844380326759
3
51168.477
28515111886090269047986543955292572308822922186003729372
943
53172.990
28515140461104803616363699396044445325706069369068807955
1431
54178.079
28515146335320386650449084280608781512598606612198329457
715669009
59194.884
28515110574711360945926212785499812286597198151124008095
44039023559
61199.396
28515127250217443412881653450967427538215219586282563638
773247292663
62204.084
28515124243731745626849477181990590851117052592526140891
80430673263293191919
70230.491
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-02-06T16:48:00Lisander ViaeneManual testing5000050000-
skipped known factor: 88967113
skipped known factor: 2292614041
skipped known factor: 52322356991
--0.000--0.395%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-21T09:15:00J FeitsmaManual testing??31.094108.72977e-100.0041.81522e-9
2008-07-21T09:15:00J FeitsmaManual testing??35.607111.37765e-80.0042.86459e-8
2014-08-08T10:34:00TJAOIManual testing??52.412160.0020.0040.003


ECM factoring results:

Old Calculation Method

Total ECM effort:8.727 GHz-days
Estimated T-Level:26.398
DigitsB1CurvesCompleteFacMiss
2011000460 / 1004.6000.982%
2550000460 / 2801.64319.286%
30250000179 / 6400.28075.585%

New Calculation Method

Total ECM effort:8.727 GHz-days
Estimated T-Level:26.398
DigitsB1CompleteFacMiss
201100023.9810.000%
25500002.9905.029%
302500000.28575.207%
3510000000.02297.843%
4030000000.00199.861%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002812.055
250000250000001575.742
2500002500000010.037
25000036750000140.592
2500003825000070.301


Lucas-Lehmer results:
No L-L results for M285151


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T12:16:13Oliver KruseOllaptop01C18406F769F0__?
2017-09-22T20:36:20Oliver KruseManual testing01C18406F769F0__?
2017-10-12T19:35:52Oliver KruseGTX-101C18406F769F0__no
2017-11-06T19:44:48kkmrkkblmbrbkc4.xlarge
88967113
2292614041
52322356991
5991861038717849
01C18406F769F0__no
2020-04-17T22:12:32Oliver KruseAddPrpType5
88967113
2292614041
52322356991
5991861038717849
BD46ABC8D4043D__no
2020-07-05T15:57:45riccardo ubertiColab_noGPU12
88967113
2292614041
52322356991
5991861038717849
37913160706323198540170777
BD46ABC8D4043DDDno


P-1 factor-bounds graph:
B1 = 50000 (P-1 stage 1)
100
101
102
103
104
105
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-05-19T10:12:11+00:00