is 2 14164763 - 1
has 4264019 decimal digits
takes 6.783 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2E132BBD6B7EC49Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.097764.1791 %3000002138020508.28568.9698 %10.383367.3922 %
Target2698.428465.2174 %100000120000000.51962.9155 %8.948166.2315 %
Difference-2-6.3307-1.0383 %+200000+201802050+7.7659+6.0543%+1.4352+1.1607 %

Known prime factors (2 factors, 143.2 bits, 0.00101103% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
141647631482050696244899965132167.0065231470149712
24 × 211 × 1549606087
2016-09-1921115496060872.642258.625109.50
14164763870402288461756481285832376.2043072420938005657
7 × 941 × 43951 × 10612661
2022-12-1843951106126611,622.30.43040.7499

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-03-16ANONYMOUSv4_computers130000617500--0.1092.130%
2022-10-28nordisweet16_30.8b14300000300000--0.2081.718%
2022-12-18nordisweet16_30.8b1430000021380205022376.2049.857.501%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-17Net_Forcev4_computers212560.001
2000-09-15ANONYMOUSv4_computers212650.264
2014-07-29NesowaManual testing2652660.528
2015-08-26ThaManual testing2662671.055


ECM factoring results:
Total ECM effort:0.675 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.675


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-04-14ANONYMOUSv4_computers2E132BBD6B7EC49B6.783
2005-04-26Thomas Sprengerv4_computers2E132BBD6B7EC49B6.783


PRP results:
dateuseridcompidcofactorsres64
2023-01-04Perigbruinneall
148205069624489996513
87040228846175648128583
E1E6AFB72C970A38


CERT results:
dateuseridcompid
2023-01-04curtischum110--07l


P-1 factor-bounds graph:
B1 = 300000, B2 = 213802050 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 130000, B2 = 617500 (P-1 stage 2)
B1 = 130000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
266
265
256
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00