is 2 1923289 - 1
has 578968 decimal digits
takes 0.104 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3D5CCEA9984841B9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26830.991169.1176 %1820000058341353070251.390117.5162 %282.381274.5271 %
Target2610.159765.5738 %100008500000.00441.7621 %0.164166.1804 %
Difference+7+30.8314+3.5439 %+18190000+58340503070+251.3857+15.7541%+282.2171+8.3467 %

Known prime factors:
No known factors for M1923289

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-09-27kurlyhex10000003000000012--0.20310.447%
2018-01-18JossManual testing19232893000000012--0.27210.821%
2018-01-22mikrS069800000032000000012--1.96615.749%
2023-01-11JossManual testing19242891890473970--9.9917.587%
2023-06-21JossJoss19242895395249860--28.2019.209%
2023-10-09Sid & AndyPterodactyl1820000058341353070--304.725.543%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-13masserManual testing15000005400000027--0.400


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2002-12-16ANONYMOUSv4_computers212580.020
2009-06-04Architects Cubedi4l_12602610.080
2011-08-27GrunwalderGIMPManual testing212630.830
2016-02-23Mark RoseManual testing2582630.730
2015-05-17snme2pm1Manual testing2632652.964
2015-09-03ramgeisManual testing2652663.885
2018-05-07TJAOIManual testing2662677.771
2019-05-03chuenkitManual testing26726815.54


ECM factoring results:
Total ECM effort:37.739 GHz-days
Estimated T-Level:25.673
DigitsB1CompleteFacMiss
201100014.2310.000%
25500001.59820.220%
302500000.13587.402%
3510000000.00999.082%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020013.79
50000545000070.504
500006600000443.449
250000400000004318.53
25000018016845011.470


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27ANONYMOUSv4_computers3D5CCEA9984841B90.104
2015-07-14MadPooManual testing3D5CCEA9984841B90.104


PRP results:
No PRP results for M1923289


CERT results:
No CERT results for M1923289


P-1 factor-bounds graph:
B1 = 18200000, B2 = 58341353070 (P-1 stage 2)
B1 = 1924289, B2 = 5395249860 (P-1 stage 2)
B1 = 1924289, B2 = 1890473970 (P-1 stage 2)
B1 = 8000000, B2 = 320000000 (P-1 stage 2)
B1 = 18200000 (P-1 stage 1)
B1 = 8000000 (P-1 stage 1)
B1 = 1923289, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1924289 (P-1 stage 1)
B1 = 1923289 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
268
267
266
265
263
261
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.67 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00