is 2 12817697 - 1
has 3858512 decimal digits
takes 5.236 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9F76903038106CC0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27274.610466.6667%50000070801731023.12727.1121%97.737669.0374%2.3707%
PrimeNet2640.277762.5000%6000017000000.08854.3284%0.366164.1231%1.6231%
GPU722684.650264.7059%9000024000000.12783.1623%4.778065.8220%1.1161%
Difference+4+69.9602+1.9608%+410000+705617310+22.9994+3.9499%+92.9596+3.2154%+3.2154%

Known prime factors:
No known factors for M12817697

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-04-19T00:00:00dakrugerv4_computers1650003960000---0.220--2.505%
2021-12-20T05:33:35LuminescenceW-2295500000708017310---23.13--7.112%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-04-27T00:00:00KA9DGXv4_computers21264--0.278--
2013-06-04T08:18:00lycornManual testing264265--0.292--
2014-04-27T15:09:00NesowaManual testing265266--0.583--
2015-04-08T09:43:00ThaManual testing266267--1.166--
2018-01-07T23:34:08ramgeisManual testing267268--2.332--
2018-01-07T23:34:08ramgeisManual testing268269--4.664--
2021-08-07T17:39:35SRBaseManual testing269270--9.328--
2021-08-30T16:21:15SRBaseManual testing270271--18.66--
2021-10-29T20:15:22-Anonymous-Manual testing271272--37.31--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.242 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:1.242 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021.242


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-04-19T00:00:00dakrugerv4_computers9F76903038106CC05.236
2005-07-01T00:00:00ANONYMOUSv4_computers9F76903038106CC05.236


PRP results:
No PRP results for M12817697


P-1 factor-bounds graph:
B1 = 500000, B2 = 708017310 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 165000, B2 = 3960000 (P-1 stage 2)
B1 = 165000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-12-20T05:33:35+00:00