is 2 9140977 - 1
has 2751709 decimal digits
takes 2.526 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE800B337379F6649double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273209.260467.1233%20000001460000003.94576.0665%213.206169.1178%1.9945%
PrimeNet2640.389462.5000%4000010000000.03703.4055%0.426463.7771%1.2771%
GPU722686.520664.7059%6000013000000.05112.4058%6.571765.5550%0.8491%
Difference+5+202.7398+2.4174%+1940000+144700000+3.8946+3.6607%+206.6344+3.5628%+3.5628%

Known prime factors:
No known factors for M9140977

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-29T11:45:00Carsten Kossendeyleela50000762500---0.036--1.037%
2012-08-16T20:11:00NesowaOutback1100002007500---0.086--1.651%
2021-09-26T14:24:08ThaZ-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_computers21262--0.067--
1999-01-17T00:00:00ANONYMOUSv4_computers21263--0.175--
1999-12-15T00:00:00ANONYMOUSv4_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--
2021-10-24T07:43:27SRBaseManual 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)
2000-02-01T00:00:00ANONYMOUSv4_computersE800B337379F66492.526
2003-03-07T00:00:00ANONYMOUSv4_computersE800B337379F66492.526


PRP results:
No PRP results for M9140977


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:
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Last modified: 2021-12-28T12:37:24+00:00