is 2 423000089 - 1
has 127335715 decimal digits
takes 8,918.252 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2822,315.523864.6341 %325000074750000218.44443.9751 %2,533.968266.0400 %
Target2822,315.523864.6341 %2400000550000000985.44344.1197 %3,300.967266.0911 %
Difference---+850000-475250000-766.9990-0.1447 %-766.9990-0.0512 %

Known prime factors (1 factor, 82.7 bits, 0.00001956% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
42300008979992813145677481797221512582.7269455413276009675
52 × 13 × 43 × 9221 × 73375433
2019-12-159221733754332,315.5122.48228.26

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-12-15KrieselManual testing32500007475000022582.726218.43.975%


Trial Factoring results:
5758596061626364656667686970717273747576777879808182
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2023-10-18James HeinrichManual testing267268
2009-07-03rudimeierclyde2682690.141
2009-07-21rudimeierdickie2692700.283
2009-09-02rudimeiershakti2702710.565
2009-10-17rudimeierbart2712721.131
2010-03-29rudimeierclyde2722732.261
2010-09-18rudimeiergonzo2732744.523
2012-05-09rudimeiervolos2742759.045
2012-05-15rudimeiervolos27527618.09
2012-05-26rudimeiervolos27627736.18
2012-08-02rudimeierurvasi27727872.36
2019-11-04KrieselManual testing278279144.7
2019-11-04KrieselManual testing279280289.4
2019-11-04KrieselManual testing280281578.9
2019-11-04KrieselManual testing2812821,158


ECM factoring results:
No ECM results for M423000089


Lucas-Lehmer results:
No L-L results for M423000089


PRP results:
No PRP results for M423000089


CERT results:
No CERT results for M423000089


P-1 factor-bounds graph:
B1 = 3250000, B2 = 74750000 (P-1 stage 2)
B1 = 3250000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 82
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00