is 2 5171459 - 1
has 1556765 decimal digits
takes 0.817 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L8708F1AC300FC63Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2675.745865.6716 %2560001183347901.53177.2559 %7.277568.1625 %
Target2662.855865.1515 %3000027500000.04081.9405 %2.896665.8278 %
Difference+1+2.8900+0.5201 %+226000+115584790+1.4909+5.3154%+4.3809+2.3347 %

Known prime factors (1 factor, 67.7 bits, 0.00130952% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
51714592433355373388454316572167.72223526778162492
22 × 11 × 53 × 269 × 659 × 56911
2009-08-23659569119.48900.00090.0013

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-08-23Carsten Kossendeymother2167.7220.0110.000%
2023-03-18USAFSS6917th_Scty_Sq256000118334790
skipped known factor: 243335537338845431657
--1.7197.961%
2023-05-11This -Anonymous-Manual testing500001000000
skipped known factor: 243335537338845431657
--0.0262.542%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-06-14ANONYMOUSv4_computers212620.089
2009-06-24GrunwalderGIMPManual testing2622630.190


ECM factoring results:
No ECM results for M5171459


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-29ANONYMOUSv4_computers8708F1AC300FC63C0.817
2000-06-23ANONYMOUSv4_computers8708F1AC300FC63C0.817


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
243335537338845431657
AC2B825CFF711882
2018-05-22Oliver KruseGTX-3
243335537338845431657
AC2B825CFF711882


CERT results:
No CERT results for M5171459


P-1 factor-bounds graph:
B1 = 256000, B2 = 118334790 (P-1 stage 2)
B1 = 256000 (P-1 stage 1)
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
263
262
this exponent TF target: 66
TF double-checked to: 67
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00