is 2 16012693 - 1
has 4820301 decimal digits
takes 8.756 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L031181F4FF5EA36Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2683.722464.7059%2400002400000.19031.7892%3.912665.3374%0.6315%
PrimeNet2650.455663.0769%7000022000000.14754.3188%0.603164.6716%1.5947%
GPU722697.455865.2174%11000030000000.21213.1729%7.667866.3210%1.1036%
Difference-1-3.7334-0.5115%+130000-2760000-0.0218-1.3837%-3.7552-0.9836%-0.9836%

Known prime factors (1 factor, 72.4 bits, 0.00045192% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1601269360818016607556789465532272.365189905647374732
22 × 3 × 61 × 150091 × 1728511
2017-01-09150091172851182.3760.18720.2422

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-11-24T00:00:00ANONYMOUSv4_computers240000240000---0.190--1.789%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-03-19T14:29:00abcManual testing21266--0.922--
2013-10-28T10:05:00NesowaManual testing266267--0.933--
2015-10-17T15:45:40mikrManual testing267268--1.867--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.831 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.831 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.831


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-05-26T00:00:00ANONYMOUSv4_computers031181F4FF5EA36C8.756
2006-04-28T00:00:00TheJudgerv4_computers031181F4FF5EA36C8.756


PRP results:
No PRP results for M16012693


P-1 factor-bounds graph:
B1 = 240000 (P-1 stage 1)
104
105
106
104
105
106
107
TF factor-bounds graph:
268
267
266
250
260
270
280
290
2100
Last modified: 2017-01-09T23:08:50+00:00