is 2 1793383 - 1
has 539863 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L078330223F9EC0D0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26833.236069.1176 %20596221972721300.99868.1691 %34.234671.6405 %
Target2610.171365.5738 %80006500000.00341.4940 %0.174766.0881 %
Difference+7+33.0647+3.5439 %+2051622+196622130+0.9953+6.6751%+34.0600+5.5524 %

Known prime factors (1 factor, 88.5 bits, 0.00493456% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17933834363157994645376312641433932788.496121646017461004601712
24 × 3 × 7 × 362041718633942267
2020-01-301636204171863394226762,281,6481.552e+92.898e+9

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-07Carsten Kossendeymother9500016387506--0.0144.875%
2014-04-27ANONYMOUSManual testing145000145000--0.0112.408%
2014-10-05JossManual testing180789180789--0.0142.649%
2015-01-10JossManual testing271183271183--0.0213.126%
2015-02-05JossManual testing542366542366--0.0434.035%
2015-03-29JossManual testing596602596602--0.0474.169%
2015-04-08JossManual testing656262656262--0.0524.306%
2015-05-01JossManual testing794076794076--0.0624.585%
2015-05-22JossManual testing873483873483--0.0694.728%
2015-06-08JossManual testing960831960831--0.0764.873%
2015-06-25JossManual testing10569141056914--0.0835.019%
2015-07-07JossManual testing11626051162605--0.0915.168%
2015-07-13JossManual testing12788651278865--0.1015.319%
2015-07-21JossManual testing14067511406751--0.1115.471%
2015-07-28JossManual testing15474261547426--0.1225.626%
2015-09-20JossManual testing17021681702168--0.1345.782%
2015-09-27JossManual testing18723841872384--0.1475.939%
2015-10-02JossManual testing20596222059622--0.1626.099%
2015-10-12mikrMSI364220012345678912--0.80013.530%
2018-10-01JossManual testing205962212553681012---13.193%
2018-10-02JossManual testing205962214347064012---13.415%
2018-10-07JossManual testing205962217933830012--0.92213.783%
2018-10-19JossManual testing205962219727213012--0.99913.940%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.021
2010-04-18Architects Cubeda3_bu22602610.086
2010-11-18GrunwalderGIMPManual testing212630.890
2016-02-23Mark RoseManual testing2582630.783
2015-05-02snme2pm1Manual testing2632653.178
2015-09-13ramgeisManual testing2652664.167
2017-08-11TJAOIManual testing2662678.334
2019-06-17TJAOIManual testing26726816.67


ECM factoring results:
Total ECM effort:38.521 GHz-days
Estimated T-Level:25.718
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024816.99
50000500000030.207
250000400000005021.33


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21ANONYMOUSv4_computers078330223F9EC0D00.097
2015-06-27MadPooManual testing078330223F9EC0D00.097


PRP results:
dateuseridcompidcofactorsres64
2020-01-31Niels_Mache_NextcloudSuperDry-X
436315799464537631264143393
36D7B2C9D4CD813F
2020-02-02daveward2005Davy
436315799464537631264143393
36D7B2C9D4CD813F


CERT results:
No CERT results for M1793383


P-1 factor-bounds graph:
B1 = 2059622, B2 = 197272130 (P-1 stage 2)
B1 = 2059622, B2 = 179338300 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 2059622, B2 = 143470640 (P-1 stage 2)
B1 = 2059622, B2 = 125536810 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 2059622 (P-1 stage 1)
B1 = 1872384 (P-1 stage 1)
B1 = 1702168 (P-1 stage 1)
B1 = 1547426 (P-1 stage 1)
B1 = 1406751 (P-1 stage 1)
B1 = 1278865 (P-1 stage 1)
B1 = 1162605 (P-1 stage 1)
B1 = 1056914 (P-1 stage 1)
B1 = 960831 (P-1 stage 1)
B1 = 873483 (P-1 stage 1)
B1 = 794076 (P-1 stage 1)
B1 = 656262 (P-1 stage 1)
B1 = 596602 (P-1 stage 1)
B1 = 542366 (P-1 stage 1)
B1 = 271183 (P-1 stage 1)
B1 = 180789 (P-1 stage 1)
B1 = 95000, B2 = 1638750 (P-1 stage 2)
B1 = 145000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00