is 2 2550089 - 1
has 767654 decimal digits
takes 0.177 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
Actual26711.652167.1642%2000000600000000.51907.6627%12.171169.6803%2.5161%
PrimeNet2590.030162.7119%110002000000.00212.6853%0.032363.7132%1.0013%
GPU722630.625965.0794%120001800000.00211.4780%0.628065.5955%0.5161%
Difference+4+11.0262+2.0848%+1988000+59820000+0.5168+6.1847%+11.5431+4.0848%+4.0848%

Known prime factors (1 factor, 35.6 bits, 0.00139774% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2550089536742732731135.64410524
22 × 3 × 877
-48772.294e-95.186e-68.990e-6

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-04T12:40:10alpertronManual testing20000006000000012-
skipped known factor: 53674273273
--0.519--7.663%


Trial Factoring results:
No TF results for M2550089


ECM factoring results:

Old Calculation Method

Total ECM effort:0.277 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.277 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.277


Lucas-Lehmer results:
No L-L results for M2550089


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-14T21:09:55Oliver KruseGTX-0A29FCD468ABBEA__no
2017-12-01T12:57:41kkmrkkblmbrbkc4.xlarge
53674273273
A29FCD468ABBEA__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2019-07-04T12:40:10+00:00