is 2 139000021 - 1
has 41843176 decimal digits
takes 774.153 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
Actual27555.049762.6667 %1425000142500011.50792.3034 %66.557663.5266 %
Target277220.202663.6364 %90000016000000077.26994.0647 %297.472565.1144 %
Difference-2-165.1529-0.9697 %+525000-158575000-65.7621-1.7612 %-230.9150-1.5878 %

Known prime factors (1 factor, 86.6 bits, 0.00006234% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1390000211211446458354733038128689912786.647435772041485782595
5 × 11 × 1979 × 10709 × 11261 × 33199
2019-04-261126133199112,7440.10060.1851

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-04-26timbitManual testing1425000142500012786.64712.051.860%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2012-11-23Richard2652660.054
2015-01-26La GüiraManual testing2662680.323
2015-01-26La GüiraManual testing2682690.430
2015-01-26La GüiraManual testing2692700.860
2015-02-06La GüiraManual testing2702711.720
2016-01-29YxinityManual testing2712723.441
2018-12-02mikrManual testing2722736.881
2018-12-02mikrManual testing27327413.76
2018-12-02mikrManual testing27427527.53


ECM factoring results:
No ECM results for M139000021


Lucas-Lehmer results:
No L-L results for M139000021


PRP results:
No PRP results for M139000021


CERT results:
No CERT results for M139000021


P-1 factor-bounds graph:
B1 = 1425000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
TF factor-bounds graph:
275
274
273
272
271
270
269
268
266
this exponent TF target: 77
TF double-checked to: 67
250
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290
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Last modified: 2024-03-13T02:15:48+00:00