is 2 71584741 - 1
has 21549155 decimal digits
takes 191.390 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
Actual27453.445363.5135 %6600006600002.55861.7217 %56.003964.1417 %
Target27453.445363.5135 %5000008500000019.78614.1146 %73.231365.0148 %
Difference---+160000-84340000-17.2274-2.3929 %-17.2274-0.8731 %

Known prime factors (1 factor, 87.9 bits, 0.00012277% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
715847412858053673505118082528700732787.8851996272972130413996
22 × 33 × 19 × 69389 × 83873 × 167159
2015-03-1583873167159446,9420.34270.6617

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-03-15TheJudgerManual testing66000066000012787.8852.6981.722%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-10-19Wojciech FlorekManual testing212640.026
2010-04-27ddboy3asus2642650.052
2010-04-29GrunwalderGIMPcompute-0-32652660.104
2010-08-06Cube1200ppp2662670.209
2010-10-14drewha - Belarusnone2672680.418
2010-10-21drewha - Belarusnone2682690.835
2013-04-15GustavSony2692701.670
2013-08-20processinfoManual testing2702713.340
2014-12-30RichD0Manual testing2712726.681
2015-02-27infinigonManual testing27227313.36
2015-03-10chalsallManual testing27327426.72


ECM factoring results:
No ECM results for M71584741


Lucas-Lehmer results:
No L-L results for M71584741


PRP results:
No PRP results for M71584741


CERT results:
No CERT results for M71584741


P-1 factor-bounds graph:
B1 = 660000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 74
TF double-checked to: 67
250
260
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290
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Last modified: 2024-03-13T02:15:48+00:00