is 2 4149659 - 1
has 1249172 decimal digits
takes 0.518 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LB695653E082E4585double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.160667.1642 %3390002318273102.34228.0543 %9.502769.8089 %
Target2651.758166.1538 %2200022500000.02591.8707 %1.784166.7870 %
Difference+2+5.4024+1.0103 %+317000+229577310+2.3162+6.1836%+7.7187+3.0219 %

Known prime factors (1 factor, 73.4 bits, 0.00176817% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4149659122301508039717780081432373.3731473633231546469
72 × 59 × 45959 × 11091001
2015-07-104595911091001675.400.11710.2041

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-06-23ANONYMOUSv4_computers20000190000--0.0051.421%
2010-09-06markrtiny9000019350006--0.0343.607%
2015-07-10David Campeaui5-2500k2373.3730.5000.000%
2023-05-08USAFSS6917th_Scty_Sq339000231827310
skipped known factor: 12230150803971778008143
--2.4739.604%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-13David Campeauv4_computers212610.037
2010-12-29Grant McCrackenthumper2612620.074
2011-07-01GrunwalderGIMPManual testing212630.385
2013-09-25JayderManual testing2632640.473
2013-10-29David CampeauManual testing2642650.900
2015-06-04snme2pm1Manual testing2652661.801


ECM factoring results:
Total ECM effort:0.900 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.900


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-07-25Stephan Gruppv4_computersB695653E082E45850.518


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
12230150803971778008143
8AF15828055FC119
2018-01-13ATHec2-1xh
12230150803971778008143
8AF15828055FC119


CERT results:
No CERT results for M4149659


P-1 factor-bounds graph:
B1 = 339000, B2 = 231827310 (P-1 stage 2)
B1 = 339000 (P-1 stage 1)
B1 = 90000, B2 = 1935000 (P-1 stage 2)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 190000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
TF factor-bounds graph:
266
265
264
263
262
261
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
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Last modified: 2024-03-13T02:15:48+00:00