is 2 109720217 - 1
has 33029077 decimal digits
takes 481.550 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE1EC367C9AD3629Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual276139.482064.4737 %4300004300002.73651.1946 %142.218564.8981 %
Target276139.482064.4737 %70000012000000045.81873.9868 %185.300765.8901 %
Difference----270000-119570000-43.0822-2.7923 %-43.0822-0.9920 %

Known prime factors (1 factor, 89.2 bits, 0.00008126% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1097202176913674794984581088738295132789.1603150592928094820068
22 × 32 × 7 × 23 × 137 × 1249 × 55837 × 56893
2020-04-1955837568931,184,2010.35570.7232

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-04-19LOBESLOBES_GL43000043000012789.1602.7361.195%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-29carlos56xp102632640.018
2010-09-15sannerud.comJim20102642650.034
2012-05-26Jud McCranieupstairs2652660.068
2013-10-12Cow_tippingManual testing2662670.136
2014-07-30symalladSchool_Laptop2672680.272
2014-09-16g0bManual testing2682690.545
2014-11-01monstedManual testing2692701.090
2015-08-16AirSquirrelsManual testing27027432.69
2020-02-08Mark RoseManual testing274276104.6


ECM factoring results:
No ECM results for M109720217


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2017-09-18patgieManual testingE1EC367C9AD3629C481.6


PRP results:
No PRP results for M109720217


CERT results:
No CERT results for M109720217


P-1 factor-bounds graph:
B1 = 430000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
276
274
270
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