is 2 75751229 - 1
has 22803393 decimal digits
takes 209.429 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
Actual27325.251763.0137 %750000168750006.52854.7774 %31.780264.7807 %
Target27450.505763.5135 %5000009000000021.55224.1881 %72.057965.0416 %
Difference-1-25.2540-0.4998 %+250000-73125000-15.0237+0.5893%-40.2777-0.2609 %

Known prime factors (1 factor, 83.2 bits, 0.00010990% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
75751229114971029944840904528124172683.24975887237383858752
26 × 3 × 251 × 373 × 977 × 4321061
2014-11-16977432106130,6290.94751.7627

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-11-16TheJudgerManual testing750000168750001222683.2496.6584.348%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2004-10-03Marzbugv4_computers212630.013
2009-05-30Architects Cubedm1_342632640.026
2010-08-09GrunwalderGIMPcompute-0-32642650.049
2011-04-26Carsten KossendeyManual testing2652670.296
2011-09-07laleraManual testing2672680.395
2011-09-11laleraManual testing2682690.789
2011-09-16ChuckManual testing26927323.68


ECM factoring results:
No ECM results for M75751229


Lucas-Lehmer results:
No L-L results for M75751229


PRP results:
No PRP results for M75751229


CERT results:
No CERT results for M75751229


P-1 factor-bounds graph:
B1 = 750000, B2 = 16875000 (P-1 stage 2)
B1 = 750000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
273
269
268
267
265
264
263
this exponent TF target: 74
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00