is 2 266381 - 1
has 80189 decimal digits
takes 0.002 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual267111.546771.6418%2000000018200000001.169911.6701%112.716674.9512%3.3094%
PrimeNet2400.000052.5000%2800700000.000114.4518%0.000159.3646%6.8646%
GPU722440.000056.8182%50001200000.000110.5905%0.000161.3914%4.5732%
Difference+23+111.5467+14.8236%+19995000+1819880000+1.1698+1.0796%+112.7164+13.5599%+13.5599%

Known prime factors (4 factors, 254.3 bits, 0.09544738% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
266381903564353929.7511696
25 × 53
-32533.671e-103.284e-76.453e-7
26638113032591198077511650.2112446231375
53 × 7 × 2795693
2014-05-2212527956930.00070.00150.0028
2663811383095900806624615921132476.872259608587100173176
23 × 359 × 1013 × 89232933941
2015-02-2710138923293394177,79648.17189.970
2663812119045047217346102885103283133097.419397747032862206032503276
22 × 19 × 29 × 72341 × 2494657053014809
2021-06-307234124946570530148091.428e+111,346,6992,515,259

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
26638111775784833804400167001032579.962
26638112497161527492899491986493274788933106.623
26638118025323462949500832815370974193786786339127.083
26638119146935670667957818304497813595342648939127.170
26638127616647830694526394989815949475564245215406345147.630
26638116287039732415685191675781842752388654183108763948156.834
26638129308425184308917011126291078784030077405274321395
369
53174.292
26638124953418529170353282730395489976968896537991939091
6239
54177.381
26638126482048239108992351289020999891164163623236610999
120647681257
62204.043
26638138196472408653761558815275333727907375127578697109
239192001341705119
68224.503
26638134512970878807587663907195703436715705451078937910
092680842935092917766023007
77254.254
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-06-30T04:26:46George WoltmanManual testing200000001820000000---1.170--11.670%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-06-30T04:26:46George WoltmanManual testing1000000083000000027P+13097.4190.506


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-05-22T17:39:00TJAOIManual testing??50.211160.0000.0040.000


ECM factoring results:

Old Calculation Method

Total ECM effort:8.580 GHz-days
Estimated T-Level:26.398
DigitsB1CurvesCompleteFacMiss
2011000460 / 1004.6000.982%
2550000460 / 2801.64319.286%
30250000179 / 6400.28075.585%

New Calculation Method

Total ECM effort:8.580 GHz-days
Estimated T-Level:26.398
DigitsB1CompleteFacMiss
201100023.9810.000%
25500002.9765.100%
302500000.28375.336%
3510000000.02297.856%
4030000000.00199.862%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002621.912
500005000000190.139
250000250000001796.530


Lucas-Lehmer results:
Exponent "266381" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T09:14:56Oliver KruseOllaptop86A5DA63A9F74B__?
2017-09-22T10:07:15Oliver KruseManual testing86A5DA63A9F74B__?
2017-10-12T19:41:35kkmrkkblmbrbkc4.xlarge86A5DA63A9F74B__no
2020-04-17T21:11:41Oliver KruseAddPrpType5
903564353
1303259119807751
138309590080662461592113
D6B8F4FC78979C__no
2021-06-30T10:00:16Randy RowellDiningRoom
903564353
1303259119807751
138309590080662461592113
211904504721734610288510328313
D6B8F4FC78979C8Bno


P-1 factor-bounds graph:
B1 = 20000000, B2 = 1820000000 (P-1 stage 2)
B1 = 10000000, B2 = 830000000 (P+1 stage 2)
B1 = 20000000 (P-1 stage 1)
B1 = 10000000 (P+1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-06-30T10:13:53+00:00