is 2 66749227 - 1
has 20093520 decimal digits
takes 168.727 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
Actual27328.657264.3836 %6450006450002.36411.8921 %31.021365.0575 %
Target27457.317064.8649 %4500007500000016.53663.9265 %73.853666.2445 %
Difference-1-28.6598-0.4813 %+195000-74355000-14.1725-2.0344 %-42.8323-1.1870 %

Known prime factors (1 factor, 91.9 bits, 0.00013770% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6674922746733710627901516061229543192891.91735006930213515068917
1032 × 199 × 8819 × 41221 × 45613
2014-04-06412214561312,321,6490.15200.3075

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-04-06TheJudgerManual testing64500064500012891.9172.9321.687%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-03-291997rj7Manual testing212640.029
2009-12-21Dr. Nowaku52642650.056
2009-12-22Vasilis Xythalisc22652660.112
2009-12-23Team_Elteor_Borislavj~BroncoATI12662670.224
2009-12-25Team_Elteor_Borislavj~BroncoATI12672680.448
2009-12-26Christian Geschwentnerarkon2682690.896
2012-02-21Thomas FehrLinux_TR_SuSE2692701.791
2012-07-17Isidre3x2Isidre3x2_s_Home2702713.582
2014-03-27kdgehmanManual testing27127321.49


ECM factoring results:
No ECM results for M66749227


Lucas-Lehmer results:
No L-L results for M66749227


PRP results:
No PRP results for M66749227


CERT results:
No CERT results for M66749227


P-1 factor-bounds graph:
B1 = 645000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
273
271
270
269
268
267
266
265
264
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00