is 2 40911511 - 1
has 12315592 decimal digits
takes 60.302 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LFCD8CDB111ECB0DFdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27223.375763.8889 %795000186825003.78205.0052 %27.157665.6963 %
Target27223.375763.8889 %280000450000005.80573.8168 %29.181465.2672 %
Difference---+515000-26317500-2.0238+1.1884%-2.0238+0.4291 %

Known prime factors (1 factor, 75.5 bits, 0.00018461% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
40911511544004508113685873231832375.526664855067457281
79 × 107 × 14923 × 5270599
2018-03-02149235270599215.420.64391.1463

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-04-10ANONYMOUSv4_computers605000605000--1.5231.922%
2018-03-02Architects Cubedburrow795000186825001222375.5263.7825.005%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2006-08-25ANONYMOUSv4_computers212620.008
2007-02-05Marzbugv4_computers212680.731
2008-07-04Amperiov4_computers212691.461
2014-12-24chalsallManual testing2692702.923
2014-12-26chalsallManual testing2702715.845
2015-06-07TheJudgerManual testing27127211.69


ECM factoring results:
No ECM results for M40911511


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-09-24curtiscgrn208--24lFCD8CDB111ECB0DF71.03
2015-12-21ANONYMOUSFCD8CDB111ECB0DF62.45


PRP results:
No PRP results for M40911511


CERT results:
No CERT results for M40911511


P-1 factor-bounds graph:
B1 = 795000, B2 = 18682500 (P-1 stage 2)
B1 = 795000 (P-1 stage 1)
B1 = 605000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
272
271
270
269
268
262
this exponent TF target: 72
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00