is 2 1749941 - 1
has 526785 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L168A0CFD21AC8D53double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26834.061169.1176 %170000002720078361001,167.022019.3864 %1,201.083175.1046 %
Target2610.175565.5738 %80005500000.00301.4127 %0.178566.0601 %
Difference+7+33.8855+3.5439 %+16992000+272007286100+1,167.0190+17.9738%+1,200.9046+9.0445 %

Known prime factors:
No known factors for M1749941

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-10Carsten Kossendeymother9500015437506--0.0144.795%
2014-04-08JossManual testing100000100000--0.0082.021%
2014-05-06JossManual testing136678136678--0.0112.336%
2014-09-15ANONYMOUSManual testing173356173356--0.0142.592%
2015-04-22Squeeky_SquirrelP4_260013000036400006--0.0255.961%
2015-06-23mikrMSI364220012345678912--0.80013.502%
2018-10-03JossManual testing17499411749941012---9.773%
2018-10-11JossManual testing174994117499410012--0.88013.586%
2018-10-19JossManual testing174994119249351012--0.95513.740%
2023-01-04JossManual testing1749941825716430--3.86316.064%
2023-01-04JossManual testing17499411458959040--6.72116.954%
2023-06-01JossManual testing17499418135913240--42.4219.580%
2023-07-18linamentU2K1700000017000000--1.3379.937%
2023-07-19linamentCyber17000000272007836100--1,41427.840%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-02masserManual testing17000006120000016541--0.453


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.022
2016-02-23Mark RoseManual testing2582600.066
2010-04-24Architects Cubedm1_fw2602610.088
2010-11-18GrunwalderGIMPManual testing212630.912
2016-02-23Mark RoseManual testing2612630.737
2015-05-13snme2pm1Manual testing2632653.257
2015-09-05ramgeisManual testing2652664.270
2017-06-09TJAOIManual testing2662678.541
2019-06-17TJAOIManual testing26726817.08


ECM factoring results:
Total ECM effort:35.530 GHz-days
Estimated T-Level:25.652
DigitsB1CompleteFacMiss
201100014.5920.000%
25500001.59920.216%
302500000.13087.769%
3510000000.00999.137%


ECM Summary

B1B2factorcurvesGHz-days
50000500000027818.95
250000400000003916.58


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02ANONYMOUSv4_computers168A0CFD21AC8D530.095
2015-06-27MadPooManual testing168A0CFD21AC8D530.095


PRP results:
No PRP results for M1749941


CERT results:
No CERT results for M1749941


P-1 factor-bounds graph:
B1 = 17000000, B2 = 272007836100 (P-1 stage 2)
B1 = 1749941, B2 = 8135913240 (P-1 stage 2)
B1 = 1749941, B2 = 1458959040 (P-1 stage 2)
B1 = 1749941, B2 = 825716430 (P-1 stage 2)
B1 = 17000000 (P-1 stage 1)
B1 = 1749941, B2 = 192493510 (P-1 stage 2)
B1 = 1749941, B2 = 174994100 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1749941, B2 = 17499410 (P-1 stage 2)
B1 = 1749941 (P-1 stage 1)
B1 = 130000, B2 = 3640000 (P-1 stage 2)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 173356 (P-1 stage 1)
B1 = 136678 (P-1 stage 1)
B1 = 130000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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267
266
265
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261
260
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.65 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00