is 2 208886869 - 1
has 62881214 decimal digits
takes 1,835.013 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
Actual2724.578261.1111%----4.578261.1111%0.0000%
PrimeNet27536.631862.6667%8000005000000044.33475.4534%80.966664.7026%2.0359%
GPU72279586.122064.5570%13000005000000050.35674.0230%636.478765.9828%1.4259%
Difference-7-581.5438-3.4459%-1300000-50000000-50.3567-4.0230%-631.9004-4.8717%-1.4259%

Known prime factors (2 factors, 133.4 bits, 0.00006385% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
208886869677129066969380067112065.876162080333295
3 × 5 × 7121 × 1517393
2013-08-07712115173930.04291.13881.9668
2088868692095892654646691235592167.506501681284391
3 × 72 × 439 × 457 × 17011
2022-09-22457170110.22750.01730.0221

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2088868691419189837708891158562208262235683020444941133.382
P-1 results:
No P-1 results for M208886869


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2013-08-07T21:47:00sasaki3mate_ma2??65.876200.0083,7730.016
2011-05-13T16:44:00Charles A. Morrischandra264265--0.018--
2022-09-22T09:50:50TJAOIManual testing267268*67.506210.0853,7730.175
2022-09-25T22:01:24LordJuliusManual testing2126867.506210.2273,7730.468
2022-09-25T22:01:24LordJuliusManual testing2126865.876200.0433,7730.088
2022-09-25T22:01:24LordJuliusManual testing268269--0.286--
2022-09-25T22:01:24LordJuliusManual testing269270--0.572--
2022-09-25T22:01:24LordJuliusManual testing270271--1.145--
2022-09-25T22:01:24LordJuliusManual testing271272--2.290--


ECM factoring results:
No ECM results for M208886869


Lucas-Lehmer results:
No L-L results for M208886869


PRP results:
No PRP results for M208886869


P-1 factor-bounds graph:
101
102
103
104
101
102
103
104
105
106
107
TF factor-bounds graph:
272
271
270
269
268
265
2
250
260
270
280
290
2100
Last modified: 2022-09-25T22:01:24+00:00