is 2 4927189 - 1
has 1483232 decimal digits
takes 0.683 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
Actual2676.030665.6716%----6.030665.6716%0.0000%
PrimeNet2610.062362.2951%220004500000.00913.3052%0.071563.5413%1.2462%
GPU722651.480764.6154%320007000000.01372.3762%1.494465.4562%0.8408%
Difference+2+4.5499+1.0563%-32000-700000-0.0137-2.3762%+4.5362+0.2154%+0.2154%

Known prime factors (2 factors, 119.8 bits, 0.00243078% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
49271895603113696255191548.99356859131
7 × 8122733
-781227338.913e-60.08890.1661
492718920213924477648815178892270.776205126335499296
25 × 3 × 3433 × 622409747
2019-08-11343362240974770.9356.816212.730

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4927189113260917095782113594462450222940939137119.769
P-1 results:
No P-1 results for M4927189


Trial Factoring results:
No TF results for M4927189


ECM factoring results:

Old Calculation Method

Total ECM effort:0.630 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.630 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.09790.776%
25500000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.630


Lucas-Lehmer results:
No L-L results for M4927189


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T17:04:19kkmrkkblmbrbkManual testing
560311369625519
A10279D2E82699__no
2018-04-09T19:38:42ATHec2-PRPCFDC
560311369625519
A10279D2E82699__no
2019-08-12T16:59:31mnd9eileen
560311369625519
2021392447764881517889
973BA0F041A434C0no
2019-08-12T18:16:15ATHec2-PRPCFDC
560311369625519
2021392447764881517889
973BA0F041A434C0no


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2019-08-12T18:16:15+00:00