is 2 2942287 - 1
has 885717 decimal digits
takes 0.250 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LAAD3699B9BC39504double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26710.098967.1642 %2800002198750401.51117.4832 %11.610069.6214 %
Target2630.542465.0794 %1700015000000.01211.9467 %0.554565.7591 %
Difference+4+9.5565+2.0848 %+263000+218375040+1.4990+5.5366%+11.0555+3.8622 %

Known prime factors (1 factor, 66.3 bits, 0.00225414% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2942287923276984665332954312066.32315689784590445
3 × 5 × 7 × 151381 × 987089
2015-04-301513819870898.36730.02430.0380

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-12-13ANONYMOUSv4_computers2048204800--0.0020.691%
2003-12-23Team Prime Ribv4_computers1000010000--0.0010.375%
2010-11-06markrtiny10500023100006--0.0284.572%
2015-04-30VictordeHollanderManual testing1000000100000012066.3230.1234.281%
2023-02-27USAFSS6917th_Scty_Sq280000219875040
skipped known factor: 92327698466533295431
--1.59910.673%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-04-15Sturle Sundev4_computers212590.013
1999-09-14raymondfv4_computers212590.013
2022-03-10LordJuliusManual testing21260
2009-02-13Sturle Sundegobi.ifi2602610.052
2011-12-26markroldgamer2612620.104
2013-01-07dbaughManual testing2622630.334
2015-04-25VictordeHollanderManual testing2632651.937


ECM factoring results:
Total ECM effort:0.937 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000090.937


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-14ANONYMOUSv4_computersAAD3699B9BC395040.250
1998-07-21ANONYMOUSv4_computersAAD3699B9BC395040.250
1999-05-09Dry Creek Photov4_computersAAD3699B9BC395040.250


PRP results:
dateuseridcompidcofactorsres64
2017-09-30alpertronManual testing
92327698466533295431
0E905980CEA6C66E
2017-11-18Oliver KruseGTX-1
92327698466533295431
0E905980CEA6C66E


CERT results:
No CERT results for M2942287


P-1 factor-bounds graph:
B1 = 280000, B2 = 219875040 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 280000 (P-1 stage 1)
B1 = 105000, B2 = 2310000 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
265
263
262
261
260
259
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=1.73 ~= -11-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00