is 2 65817277 - 1
has 19812975 decimal digits
takes 166.371 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
Actual27458.128664.8649 %----58.128664.8649 %
Target27458.128664.8649 %4500007500000016.53663.9197 %74.665266.2420 %
Difference----450000-75000000-16.5366-3.9197 %-16.5366-1.3772 %

Known prime factors (1 factor, 81.0 bits, 0.00012307% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6581727724152902635604062944991832580.99818348451756522883
719 × 1709 × 6997 × 2134109
2014-02-28699721341096,444.70.45040.7960

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-02-28La GüiraLa_duodecima2580.9984.1320.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-11-28Gordon Spencev4_computers212590.001
2004-08-061997rj7v4_computers212600.001
2022-03-30LordJuliusManual testing260263
2009-01-23Wojciech FlorekManual testing2632640.030
2009-04-01BitMaster69lmk09112642660.170
2009-04-05Andrey Kurgannikovhome-22662670.227
2009-04-08Andrey Kurgannikovhome-22672680.454
2009-10-28lindeepluto2682690.908
2012-01-30Helmut Zulusvibra2692701.817
2013-07-18Carsten KossendeyManual testing2702713.633
2014-01-19bayanneManual testing2712727.266
2014-02-21A_SavchenkoManual testing27227443.60


ECM factoring results:
No ECM results for M65817277


Lucas-Lehmer results:
No L-L results for M65817277


PRP results:
No PRP results for M65817277


CERT results:
No CERT results for M65817277


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
107
TF factor-bounds graph:
274
272
271
270
269
268
267
266
264
263
260
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
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290
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Last modified: 2024-03-13T02:15:48+00:00