is 2 1746179 - 1
has 525653 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L9A5C8423CE88FF38double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26834.134569.1176 %17461791920796900.95317.9894 %35.087571.5850 %
Target2610.175965.5738 %80005500000.00301.4120 %0.178966.0599 %
Difference+7+33.9585+3.5439 %+1738179+191529690+0.9501+6.5774%+34.9087+5.5251 %

Known prime factors (1 factor, 74.0 bits, 0.00423936% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1746179192444790403961214121292374.0275510454266256816
24 × 3 × 3083 × 37236824699
2020-02-183083372368246992,191.0159.59298.07

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-10Carsten Kossendeymother9500015437506--0.0144.794%
2014-04-05JossManual testing100000100000--0.0082.020%
2014-05-06JossManual testing136757136757--0.0112.336%
2014-09-15ANONYMOUSManual testing173514173514--0.0142.592%
2015-04-20mikrMSI24754008666000012--0.55612.663%
2018-07-20JossManual testing174617917461790012--0.87813.578%
2018-10-18JossManual testing174617919207969012--0.95313.733%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-25ANONYMOUSv4_computers212580.022
2016-02-23Mark RoseManual testing2582600.066
2010-04-19Architects Cubedm1_fw2602610.088
2016-02-23Mark RoseManual testing2612620.176
2010-11-18GrunwalderGIMPManual testing212630.914
2016-02-23Mark RoseManual testing2622630.562
2015-05-12snme2pm1Manual testing2632641.124
2015-05-12snme2pm1Manual testing2642652.140
2015-09-04ramgeisManual testing2652664.279
2017-10-27TJAOIManual testing2662678.559
2019-06-24TJAOIManual testing26726817.12


ECM factoring results:
Total ECM effort:38.340 GHz-days
Estimated T-Level:25.718
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024916.96
50000500000020.137
250000400000005021.25


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02ANONYMOUSv4_computers9A5C8423CE88FF380.095
1999-09-30ANONYMOUSv4_computers9A5C8423CE88FF380.095
2015-07-18MadPooManual testing9A5C8423CE88FF380.095


PRP results:
dateuseridcompidcofactorsres64
2020-02-18Christoph ZengerManual testing
19244479040396121412129
4554E050C7E65D59
2020-02-19ANONYMOUS
19244479040396121412129
4554E050C7E65D59


CERT results:
No CERT results for M1746179


P-1 factor-bounds graph:
B1 = 1746179, B2 = 192079690 (P-1 stage 2)
B1 = 1746179, B2 = 174617900 (P-1 stage 2)
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 1746179 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 173514 (P-1 stage 1)
B1 = 136757 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
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Last modified: 2024-02-29T14:28:04+00:00