is 2 12890429 - 1
has 3880406 decimal digits
takes 5.265 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 PRP tests remaining
ResidueStatus
L-LA0F8A12486448911double-checked
PRP8619733F6996559CPRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.305164.1791 %50000044627310014.680910.3171 %16.986067.8748 %
Target2684.624064.7059 %90000120000000.43763.1649 %5.061665.8229 %
Difference-1-2.3188-0.5268 %+410000+434273100+14.2433+7.1523%+11.9244+2.0519 %

Known prime factors (1 factor, 65.2 bits, 0.00050579% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12890429423528818499655660792065.1991642803426091
23 × 71426235917
2014-04-2723714262359170.66022,304.94,304.9

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-06-09ANONYMOUSv4_computers1550002286250--0.1613.421%
2023-10-20nordisweet16_30.8b14500000500000--0.2962.371%
2023-10-27nordisweet16_30.8b14500000446273100--17.219.501%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-09-23ANONYMOUSv4_computers212640.152
2013-06-01lycornManual testing2642650.290
2014-04-27NesowaManual testing265266
65.199
20
0.115


ECM factoring results:
No ECM results for M12890429


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-10-20ANONYMOUSv4_computersA0F8A124864489115.265
2004-09-16ANONYMOUSv4_computersA0F8A124864489115.265


PRP results:
dateuseridcompidcofactorsres64
2022-06-09Ember_EdisonMainServer
42352881849965566079
8619733F6996559C


CERT results:
dateuseridcompid
2022-06-09Michael_Linmiclin_computer


P-1 factor-bounds graph:
B1 = 500000, B2 = 446273100 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 155000, B2 = 2286250 (P-1 stage 2)
B1 = 155000 (P-1 stage 1)
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106
100
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1010
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TF factor-bounds graph:
266
265
264
this exponent TF target: 68
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00