is 2 104786761 - 1
has 31543959 decimal digits
takes 417.219 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
Actual276146.048964.4737 %6500006500003.75271.4363 %149.801664.9840 %
Target276146.048964.4737 %65000012000000041.29373.9260 %187.342765.8685 %
Difference-----119350000-37.5411-2.4897 %-37.5411-0.8845 %

Known prime factors (1 factor, 85.4 bits, 0.00008146% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
104786761496838888589718215503257272685.361237071402841489783
3 × 7 × 312 × 43 × 443 × 2857 × 215851
2021-07-162857215851143,7780.08350.1268

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-07-16KrieselManual testing65000065000012685.3613.7751.436%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-04-19sasaki3mate_ma22632640.019
2010-08-28sasaki3mate242642650.036
2012-05-08mmVIR0042652660.071
2013-09-09willmoreManual testing2662670.143
2014-05-10webbertManual testing2672680.285
2014-05-16webbertManual testing2682690.571
2015-01-09shaugeManual testing2692713.423
2018-01-10el groccoManual testing2712724.564
2020-02-21Will HockensmithManual testing2722739.128
2020-04-01SRBaseManual testing27327418.26
2021-03-28TheJudgerManual testing274276109.5


ECM factoring results:
No ECM results for M104786761


Lucas-Lehmer results:
No L-L results for M104786761


PRP results:
No PRP results for M104786761


CERT results:
No CERT results for M104786761


P-1 factor-bounds graph:
B1 = 650000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
TF factor-bounds graph:
276
274
273
272
271
269
268
267
266
265
264
this exponent TF target: 76
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00