is 2 66153233 - 1
has 19914108 decimal digits
takes 167.221 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
Actual27328.915464.3836 %640000136000004.93384.4313 %33.849265.9618 %
Target27457.833464.8649 %4500007500000016.53663.9221 %74.370066.2429 %
Difference-1-28.9180-0.4813 %+190000-61400000-11.6028+0.5092%-40.5208-0.2811 %

Known prime factors (1 factor, 88.6 bits, 0.00013391% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
661532334636782960046083540136393912788.5833504577743045516415
5 × 599 × 3541 × 83921 × 3937697
2014-03-308392139376971,020,3981.07721.4687

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-03-30TheJudgerManual testing640000136000001222788.5832.9324.026%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2004-02-14Team Prime Ribv4_computers212600.001
2009-03-021997rj7Manual testing212640.030
2022-03-30LordJuliusManual testing264265
2010-01-23biszczukstacja412652660.113
2010-01-24TaxythingyHaihappen2662670.226
2010-01-25TaxythingyHaihappen2672680.452
2010-01-27runesklennie2682690.904
2012-02-06NBBlackBird2692701.807
2012-07-01ANONYMOUS2702713.615
2014-03-08PhantomasManual testing2712727.230
2014-03-19ChuckManual testing27227314.46


ECM factoring results:
No ECM results for M66153233


Lucas-Lehmer results:
No L-L results for M66153233


PRP results:
No PRP results for M66153233


CERT results:
No CERT results for M66153233


P-1 factor-bounds graph:
B1 = 640000, B2 = 13600000 (P-1 stage 2)
B1 = 640000 (P-1 stage 1)
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105
106
103
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105
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108
TF factor-bounds graph:
273
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270
269
268
267
266
265
264
260
this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00