is 2 102206971 - 1
has 30767365 decimal digits
takes 406.947 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
Actual276149.735364.4737 %7370007370004.25491.5126 %153.990365.0110 %
Target276149.735364.4737 %65000011000000038.14833.8507 %187.883665.8417 %
Difference---+87000-109263000-33.8933-2.3381 %-33.8933-0.8306 %

Known prime factors (1 factor, 82.3 bits, 0.00008049% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10220697157962523516794766713808012582.26128355464871762400
25 × 32 × 52 × 79 × 203227 × 245299
2021-01-172032272452999,583.21.18652.3879

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-01-17MarkSdesktop-i773700073700012582.2614.2551.513%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-05-101997rj7Manual testing2632640.019
2010-08-17Torchwood InstitutePhenom95502642650.037
2012-04-21Mr-PlonkLinux-i72652660.073
2013-09-07processinfoManual testing2662670.146
2013-09-29SMoffatManual testing2672680.292
2013-10-12Cow_tippingManual testing2682690.585
2013-10-16Mike IsraelManual testing2692701.170
2014-12-27ITSLJCA_-_ServerStation2702712.340
2017-10-22el groccoManual testing2712724.679
2020-03-06el groccoManual testing2722739.359
2020-03-30SRBaseManual testing27327418.72
2020-10-19penluManual testing27427537.43
2020-10-19penluManual testing27527674.87


ECM factoring results:
No ECM results for M102206971


Lucas-Lehmer results:
No L-L results for M102206971


PRP results:
No PRP results for M102206971


CERT results:
No CERT results for M102206971


P-1 factor-bounds graph:
B1 = 737000 (P-1 stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
276
275
274
273
272
271
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: 2024-02-09T03:30:02+00:00