is 2 2480717 - 1
has 746771 decimal digits
takes 0.172 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LA31BDD7382CF7ECEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26824.027367.6471 %2382500857701000.69657.5480 %24.723870.0891 %
Target2630.643465.0794 %110008000000.00541.3799 %0.648865.5612 %
Difference+5+23.3839+2.5677 %+2371500+84970100+0.6911+6.1681%+24.0750+4.5278 %

Known prime factors (1 factor, 89.2 bits, 0.00359612% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24807177157526626966999031556733832789.210144263263946814550623
3 × 383 × 10709 × 24439 × 479737177
2020-05-252443947973717780,106,8382.63114.9097

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-07-06ANONYMOUSv4_computers10000010000006--0.0153.659%
2014-09-23JossManual testing125873125873--0.0131.840%
2014-10-31mikrMSI23825008577010012--0.69711.221%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-05-16ANONYMOUSv4_computers212580.015
1999-05-09ANONYMOUSv4_computers212590.015
2016-02-23Mark RoseManual testing2592600.031
2009-01-15Sturle Sundescarpia.ifi2602610.062
2012-06-09Sebastian HornbostelManual testing2612620.124
2013-01-23dbaughManual testing2622630.396
2015-03-03VictordeHollanderManual testing2632652.298
2015-10-29ramgeisManual testing2652663.012
2017-07-22Gordon SpenceManual testing2662676.025
2019-07-17TJAOIManual testing26726812.05


ECM factoring results:
Total ECM effort:3.701 GHz-days
Estimated T-Level:20.747
DigitsB1CompleteFacMiss
20110001.61519.881%
25500000.14986.117%
302500000.00999.062%


ECM Summary

B1B2factorcurvesGHz-days
500005000000393.426
50000500000030.275


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-16ANONYMOUSv4_computersA31BDD7382CF7ECE0.172
1999-07-27Stephen Woodv4_computersA31BDD7382CF7ECE0.172
2018-05-30kkmrkkblmbrbkoldA31BDD7382CF7ECE0.172


PRP results:
dateuseridcompidcofactorsres64
2020-05-26Klaus Nordmannno1
715752662696699903155673383
F9E95830D3239373
2020-05-27Luigi Morelli9800X
715752662696699903155673383
F9E95830D3239373


CERT results:
No CERT results for M2480717


P-1 factor-bounds graph:
B1 = 2382500, B2 = 85770100 (P-1 stage 2)
B1 = 2382500 (P-1 stage 1)
B1 = 100000, B2 = 1000000 (P-1 stage 2)
B1 = 125873 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
266
265
263
262
261
260
259
258
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=20.75 ~= 52-bit
250
260
270
280
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00