is 2 81023077 - 1
has 24390377 decimal digits
takes 252.831 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
Actual27594.441164.0000 %6850006850003.09941.5882 %97.540564.5718 %
Target27594.441164.0000 %5500009000000024.53973.8808 %118.980865.3971 %
Difference---+135000-89315000-21.4402-2.2926 %-21.4402-0.8253 %

Known prime factors (1 factor, 83.6 bits, 0.00010323% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
81023077150462424567505184298475592683.63892851586324909127
33 × 179 × 3989 × 67979 × 70849
2017-04-04679797084937,1920.30830.6260

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-04-04bamWinSvr2012R268500068500012683.6383.0991.588%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-12Architects Cubedm1_692642650.046
2011-02-08steinrarManual testing2652660.092
2013-01-31blackivoryelenatucano2662670.184
2013-02-05ANONYMOUS2672680.369
2013-06-08SMoffatManual testing2682702.214
2013-07-17Milldangbsmt_xp2702712.951
2014-01-10SMoffatManual testing2712725.903
2016-10-07BdotManual testing27227311.81
2016-10-29RichD0Manual testing27327423.61
2016-11-01Sid & AndyManual testing27427547.22


ECM factoring results:
No ECM results for M81023077


Lucas-Lehmer results:
No L-L results for M81023077


PRP results:
No PRP results for M81023077


CERT results:
No CERT results for M81023077


P-1 factor-bounds graph:
B1 = 685000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
275
274
273
272
271
270
268
267
266
265
this exponent TF target: 75
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00