is 2 160311527 - 1
has 48258579 decimal digits
takes 1,052.044 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
Actual279763.720464.5570 %5000000150000000122.75165.4307 %886.472066.4818 %
Target278381.859764.1026 %1000000180000000102.31593.8993 %484.175665.5023 %
Difference+1+381.8608+0.4544 %+4000000-30000000+20.4356+1.5314%+402.2964+0.9794 %

Known prime factors (1 factor, 89.1 bits, 0.00005559% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1603115276717080075869411390136792392789.1182095008450599254597
11 × 19 × 61 × 251 × 5881 × 111322963
2020-12-175881111322963782,05157.767107.79

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-12-17Roland ClarksonManual testing500000015000000022789.118127.35.890%


Trial Factoring results:
5758596061626364656667686970717273747576777879
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-29Corranrri72632640.012
2011-02-02Ungelovendegammali7_12642650.023
2013-02-26Richardworkmy2652660.047
2015-05-02tscsvn72662670.093
2016-03-02XZTManual testing2672680.186
2017-03-29La GüiraManual testing2682690.373
2017-03-29La GüiraManual testing2692700.746
2017-11-18jiboManual testing2702711.492
2017-11-18jiboManual testing2712722.983
2017-11-20Ilya AlexandrovManual testing2722735.967
2020-12-17Roland ClarksonManual testing27327411.93
2020-12-17Roland ClarksonManual testing27427523.87
2020-12-17Roland ClarksonManual testing27527647.73
2020-12-17Roland ClarksonManual testing27627795.47
2020-12-17Roland ClarksonManual testing277278190.9
2020-12-17Roland ClarksonManual testing278279381.9


ECM factoring results:
No ECM results for M160311527


Lucas-Lehmer results:
No L-L results for M160311527


PRP results:
No PRP results for M160311527


CERT results:
No CERT results for M160311527


P-1 factor-bounds graph:
B1 = 5000000, B2 = 150000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
279
278
277
276
275
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 78
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00