is 2 16012757 - 1
has 4820321 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-L659C7773D4B18367double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual274238.926167.5676%20000048500000.35942.2401%239.285668.2941%0.7265%
PrimeNet2650.455663.0769%7000022000000.14754.3188%0.603164.6716%1.5947%
GPU722697.455765.2174%11000030000000.21213.1729%7.667866.3210%1.1036%
Difference+5+231.4704+2.3502%+90000+1850000+0.1474-0.9329%+231.6178+1.9731%-0.3771%

Known prime factors:
No known factors for M16012757

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-07-14T00:00:00ANONYMOUSv4_computers2000004850000---0.359--2.240%


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--
2017-09-24T21:56:16ramgeisManual testing268269--3.733--
2021-05-04T18:54:28lycornManual testing269270--7.467--
2021-09-16T06:31:42SRBaseManual testing270271--14.93--
2021-10-08T19:16:47-Anonymous-Manual testing271272--29.87--
2022-02-11T15:56:09-Anonymous-Manual testing272273--59.73--
2022-02-11T15:56:09-Anonymous-Manual testing273274--119.5--


ECM factoring results:
Total ECM effort:0.831 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.831


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-08-03T00:00:00ANONYMOUSv4_computers659C7773D4B183678.756
2006-10-01T00:00:00ANONYMOUSv4_computers659C7773D4B183678.756


PRP results:
No PRP results for M16012757


P-1 factor-bounds graph:
B1 = 200000, B2 = 4850000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
104
105
106
104
105
106
107
TF factor-bounds graph:
274
273
272
271
270
269
268
267
266
250
260
270
280
290
2100
Last modified: 2022-02-11T15:56:09+00:00