is 2 2948987 - 1
has 887734 decimal digits
takes 0.251 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
Actual26710.076067.1642%----10.076067.1642%0.0000%
PrimeNet2590.026062.7119%130002600000.00333.0734%0.029363.8579%1.1460%
GPU722630.541265.0794%170003000000.00401.9475%0.545265.7594%0.6801%
Difference+4+9.5348+2.0848%-17000-300000-0.0040-1.9475%+9.5308+1.4047%+1.4047%

Known prime factors (1 factor, 44.8 bits, 0.00151968% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2948987309545256793691444.8155248332
22 × 32 × 19 × 7673
-1976737.968e-75.381e-59.640e-5

P-1 results:
No P-1 results for M2948987


Trial Factoring results:
No TF results for M2948987


ECM factoring results:

Old Calculation Method

Total ECM effort:0.347 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.347 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.347


Lucas-Lehmer results:
No L-L results for M2948987


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-25T21:36:04Oliver KruseGTX-3
30954525679369
45BD0E0D3D2BF0__no
2017-12-10T02:04:31kkmrkkblmbrbkold
30954525679369
45BD0E0D3D2BF0__no


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2018-06-05T17:29:40+00:00