is 2 2291327 - 1
has 689759 decimal digits
takes 0.155 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
Actual26712.968067.1642%500000150000000.12645.2074%13.094468.8741%1.7099%
PrimeNet2580.016862.0690%100001900000.00192.9260%0.018763.1788%1.1098%
GPU722620.268164.5161%120002000000.00221.7363%0.270365.1322%0.6161%
Difference+5+12.6999+2.6481%+488000+14800000+0.1242+3.4712%+12.8241+3.7419%+3.7419%

Known prime factors (1 factor, 43.0 bits, 0.00187714% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
229132788665602030871343.0121934809
1033 × 1873
-103318739.153e-70.00010.0002

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-04-22T15:30:37alpertronManual testing5000001500000012-
skipped known factor: 8866560203087
--0.126--5.207%


Trial Factoring results:
No TF results for M2291327


ECM factoring results:

Old Calculation Method

Total ECM effort:0.265 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.265 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.265


Lucas-Lehmer results:
No L-L results for M2291327


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-11T09:08:19Oliver KruseGTX-1
8866560203087
901386580B2486__no
2017-11-22T11:35:03kkmrkkblmbrbkc4.xlarge
8866560203087
901386580B2486__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2018-01-30T23:12:48+00:00