is 2 206779 - 1
has 62247 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actualunknown30000000100708329922203,668.770372.5828%3,668.770372.5828%72.5828%
PrimeNet2400.000055.0000%2200550000.000012.9459%0.000060.8256%5.8256%
GPU722440.000059.0909%3600800000.00018.9145%0.000162.7378%3.6469%
Difference-440.0000-59.0909%+29996400+10070832912220+3,668.7703+63.6682%+3,668.7703+9.8450%+68.9359%

Known prime factors (2 factors, 172.3 bits, 0.08330607% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2067794407753673459271548.6471065812697
32 × 118423633
-91184236330.00030.04310.0806
2067791625725581959334640034019681515464159138123.61239310703261920568337065651771105
5 × 13 × 67 × 421 × 547 × 692459 × 6871211 × 8238077677
2022-02-11687121182380776778.026e+113.04445.6049

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
20677971657979059179667842725467162825015727024885986498
57
52172.259
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-05-09T22:28:40Oliver KruseOllaptop300000003000000000-
skipped known factor: 440775367345927
--1.282--43.635%
2022-02-11T08:39:41Oliver KruseThreadripper-PC300000001007083299222038123.6123,6690.0027,33862.694%


Trial Factoring results:
No TF results for M206779


ECM factoring results:
Total ECM effort:13.077 GHz-days
Estimated T-Level:28.671
DigitsB1CompleteFacMiss
201100049.8550.000%
25500007.0590.086%
302500000.73447.985%
3510000000.06094.184%
4030000000.00499.602%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002811.373
250000250000003668.940
2500003600000070.196
25000038500000421.209
25000055133578571.360


Lucas-Lehmer results:
No L-L results for M206779


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T02:43:05Oliver KruseOllaptop
440775367345927
0A3D9562B32381__no
2017-09-22T10:03:06Oliver KruseManual testing
440775367345927
0A3D9562B32381__no
2017-10-12T08:12:01kkmrkkblmbrbkc4.xlarge0A3D9562B32381__no
2020-04-17T19:07:55Oliver KruseAddPrpType5
440775367345927
56D37CA1B5E352__no
2022-02-11T10:49:09Oliver KruseIOS-5
440775367345927
16257255819593346400340196815154641591
56D37CA1B5E35214no


P-1 factor-bounds graph:
B1 = 30000000, B2 = 10070832992220 (P-1 stage 2)
B1 = 30000000, B2 = 3000000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-09-25T15:22:12+00:00