is 2 9141151 - 1
has 2751761 decimal digits
takes 2.527 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L287F1F4CCD6227EEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273209.256467.1233%20000001460000003.94576.0665%213.202169.1178%1.9945%
PrimeNet2640.389462.5000%4000010000000.03703.4055%0.426463.7771%1.2771%
GPU722686.520564.7059%6000013000000.05112.4058%6.571665.5550%0.8491%
Difference+5+202.7359+2.4174%+1940000+144700000+3.8946+3.6607%+206.6305+3.5628%+3.5628%

Known prime factors:
No known factors for M9141151

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-27T16:08:00Carsten Kossendeyleela50000762500---0.036--1.037%
2012-08-16T23:33:00NesowaOutback1100002007500---0.086--1.651%
2021-09-26T16:24:27ThaZ-1702000000146000000---3.946--6.067%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-06T00:00:00ANONYMOUSv4_computers21255--0.001--
1999-01-02T00:00:00ANONYMOUSv4_computers21261--0.034--
1999-01-10T00:00:00ANONYMOUSv4_computers21263--0.175--
2001-06-30T00:00:00ANONYMOUSv4_computers21263--0.175--
2001-07-29T00:00:00ANONYMOUSv4_computers21263--0.175--
2003-12-13T00:00:00ANONYMOUSv4_computers21263--0.175--
2004-02-07T00:00:00Sturle Sundev4_computers21264--0.389--
2012-10-02T23:20:00dbaughManual testing264265--0.409--
2012-10-02T23:22:00dbaughManual testing265266--0.817--
2014-03-30T20:57:00ramgeisManual testing266267--1.635--
2014-03-30T20:57:00ramgeisManual testing267268--3.270--
2014-03-30T20:57:00ramgeisManual testing268269--6.540--
2014-03-30T20:57:00ramgeisManual testing269270--13.08--
2016-01-22T18:19:11ramgeisManual testing270271--26.16--
2021-10-17T07:24:41SRBaseManual testing271272--52.32--
2021-12-28T12:37:24-Anonymous-Manual testing272273--104.6--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.261 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:1.261 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.09790.776%
25500000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000031.261


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-07-03T00:00:00ANONYMOUSv4_computers287F1F4CCD6227EE2.527
2003-03-07T00:00:00ANONYMOUSv4_computers287F1F4CCD6227EE2.527


PRP results:
No PRP results for M9141151


P-1 factor-bounds graph:
B1 = 2000000, B2 = 146000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 110000, B2 = 2007500 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 50000, B2 = 762500 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
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TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
264
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261
255
250
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270
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2100
Last modified: 2021-12-28T12:37:24+00:00