is 2 107528191 - 1
has 32369211 decimal digits
takes 441.015 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
Actual276142.325464.4737 %9010009010005.35831.6610 %147.683765.0638 %
Target276142.325464.4737 %70000012000000042.81733.9771 %185.142765.8866 %
Difference---+201000-119099000-37.4590-2.3161 %-37.4590-0.8228 %

Known prime factors (1 factor, 79.6 bits, 0.00007399% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1075281918912991091286322459557592479.5604144490392889769
3 × 13 × 83 × 257 × 9323 × 534367
2021-11-2993235343672,087.20.22560.3234

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-11-29Simon Josefssoncto1290100090100012479.5605.3581.661%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-04-30Richardsvn_022632640.018
2010-09-08DerekBasement2642650.035
2012-05-19carlos56amd6002652660.069
2013-09-19Adam StinchcombeManual testing2662670.139
2013-09-20PascalBieriManual testing2672680.278
2013-09-22RobishManual testing2682690.556
2013-09-25RobishManual testing2692701.112
2014-06-07Andreas_TruetschManual testing2702712.224
2015-01-20Brandon VincentManual testing2712724.448
2020-03-20Niels_Mache_NextcloudManual testing27227426.69
2021-04-16TheJudgerManual testing274276106.7


ECM factoring results:
No ECM results for M107528191


Lucas-Lehmer results:
No L-L results for M107528191


PRP results:
No PRP results for M107528191


CERT results:
No CERT results for M107528191


P-1 factor-bounds graph:
B1 = 901000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
TF factor-bounds graph:
276
274
272
271
270
269
268
267
266
265
264
this exponent TF target: 76
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00