is 2 138521843 - 1
has 41699230 decimal digits
takes 771.490 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
Actual27555.239762.6667 %----55.239762.6667 %
Target277220.962763.6364 %90000016000000077.26994.0630 %298.232665.1138 %
Difference-2-165.7230-0.9697 %-900000-160000000-77.2699-4.0630 %-242.9929-2.4471 %

Known prime factors (1 factor, 74.7 bits, 0.00005392% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
138521843304404512019269493756712374.688109875996964345
5 × 2239847 × 9811027
2016-05-172239847981102744.62821.42036.813

P-1 results:
No P-1 results for M138521843


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-12Torchwood InstituteATH2-630-temp2632640.014
2010-12-04Richard2642650.027
2012-11-18Le ComteiMac2652660.054
2015-02-08rubikvn2100b_com2662670.108
2016-02-16GustavEbbersManual testing2672680.216
2016-03-10dbaughManual testing2682690.432
2016-03-30Josh FamestadManual testing2692700.863
2016-05-17PEDManual testing270275
74.688
23
44.91


ECM factoring results:
No ECM results for M138521843


Lucas-Lehmer results:
No L-L results for M138521843


PRP results:
No PRP results for M138521843


CERT results:
No CERT results for M138521843


P-1 factor-bounds graph:
105
106
107
105
106
107
TF factor-bounds graph:
275
270
269
268
267
266
265
264
this exponent TF target: 77
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00