is 2 1474159 - 1
has 443767 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LAF5848C28104674Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26720.156568.6567 %500000150000000.07144.9380 %20.227970.2044 %
Target2600.104265.0000 %65005000000.00181.4480 %0.106065.5068 %
Difference+7+20.0523+3.6567 %+493500+14500000+0.0696+3.4900%+20.1219+4.6977 %

Known prime factors (2 factors, 152.1 bits, 0.01031668% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
147415966121802660809886584812272.4862242695756048360
23 × 3 × 5 × 181 × 317 × 325725139
2014-01-12317325725139648.730.98251.8350
14741599153492626668298291878872479.599310464903265804377
32 × 19 × 8521 × 213071732147
2019-04-12852121307173214783,053642.681,200.3

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-29Team Prime Ribv4_computers20000270000--0.0022.641%
2010-10-29Rob_Deetwopc100000200000--0.0072.985%
2010-10-30Rob_Deetwopc200000300000--0.0133.541%
2010-10-31Rob_Deetwopc20000010000006--0.0165.088%
2010-11-01Rob_Deetwopc20000020000006--0.0195.993%
2010-11-02Rob_Deetwopc20000030000006--0.0236.528%
2010-11-03Rob_Deetwopc20000040000006--0.0266.909%
2010-11-04Rob_Deetwopc20000050000006--0.0307.206%
2016-03-17alpertronManual testing5000001500000012---9.460%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-07-30ANONYMOUSv4_computers212580.026
2010-05-09Architects Cubedm1_tt2602610.104
2011-04-05GrunwalderGIMPManual testing212631.082


ECM factoring results:
Total ECM effort:29.787 GHz-days
Estimated T-Level:25.703
DigitsB1CompleteFacMiss
201100014.6150.000%
25500001.64719.258%
302500000.14186.886%
3510000000.01099.022%


ECM Summary

B1B2factorcurvesGHz-days
10.047
500005000000442.277
50000500000020611.44
250000350000005016.02


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-14Ethan O'Connorv4_computersAF5848C28104674B0.056


PRP results:
dateuseridcompidcofactorsres64
2017-10-01Oliver KruseGTX-3
6612180266080988658481
51AFB5FAB942930B
2017-10-28kkmrkkblmbrbkold
6612180266080988658481
51AFB5FAB942930B
2019-04-13matzetonibobuba
6612180266080988658481
915349262666829829187887
C4EBDCA152E2E549
2019-04-14Chang Chia-Tchehomura
6612180266080988658481
915349262666829829187887
C4EBDCA152E2E549


CERT results:
No CERT results for M1474159


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 200000, B2 = 300000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
263
261
258
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
280
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Last modified: 2024-02-09T03:30:02+00:00