is 2 2263087 - 1
has 681258 decimal digits
takes 0.149 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
Actual26713.129867.1642%500000150000000.12305.1997%13.252868.8715%1.7074%
PrimeNet2580.017062.0690%100001900000.00192.9193%0.018963.1763%1.1073%
GPU722620.271564.5161%120001900000.00211.7067%0.273565.1217%0.6056%
Difference+5+12.8583+2.6481%+488000+14810000+0.1209+3.4930%+12.9793+3.7498%+3.7498%

Known prime factors (2 factors, 92.6 bits, 0.00409214% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2263087315248019111134.8766965
5 × 7 × 199
-71991.525e-91.665e-61.935e-6
22630872395277786074944011857.73352920585600
27 × 3 × 52 × 5512561
2015-07-2112855125610.01020.02860.0535

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
226308775510657727831244115666003112892.609
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-04-19T01:43:13alpertronManual testing5000001500000012-
skipped known factor: 31524801911
skipped known factor: 239527778607494401
--0.123--5.200%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-07-13T10:36:00TJAOIManual testing257258*57.733180.0020.3030.004


ECM factoring results:

Old Calculation Method

Total ECM effort:0.516 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:0.516 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.516


Lucas-Lehmer results:
No L-L results for M2263087


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-12T13:25:32kkmrkkblmbrbkc4.xlarge84CD04FB444030__no
2017-10-29T13:36:16Oliver KruseGTX-2
31524801911
239527778607494401
84CD04FB444030__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
258
230
240
250
260
270
280
290
2100
Last modified: 2018-09-28T16:56:05+00:00