is 2 4907941 - 1
has 1477438 decimal digits
takes 0.680 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
Actual2676.054365.6716%----6.054365.6716%0.0000%
PrimeNet2610.062662.2951%220004500000.00913.3030%0.071763.5405%1.2454%
GPU722651.486564.6154%320007000000.01372.3746%1.500365.4556%0.8403%
Difference+2+4.5677+1.0563%-32000-700000-0.0137-2.3746%+4.5540+0.2160%+0.2160%

Known prime factors (2 factors, 117.9 bits, 0.00240164% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
49079411959609701116491547.47819963664
24 × 7 × 178247
-161782474.353e-60.00200.0036
490794115509707704377577224332270.394158006256639776
25 × 943273 × 5234641
2019-08-01943273523464156.8700.23660.3858

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
490794130392973678979466346156665196192201736117.871
P-1 results:
No P-1 results for M4907941


Trial Factoring results:
No TF results for M4907941


ECM factoring results:

Old Calculation Method

Total ECM effort:0.210 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.210 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.210


Lucas-Lehmer results:
No L-L results for M4907941


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:41:00kkmrkkblmbrbkManual testing
195960970111649
63DC23154AADB3__no
2018-04-12T08:54:18Oliver KruseGTX-3
195960970111649
63DC23154AADB3__no
2019-08-01T22:49:28ATHec2-PRPCF
195960970111649
1550970770437757722433
00DE36CC23CCA011no
2019-08-02T21:17:26kkmrkkblmbrbkc5.large
195960970111649
1550970770437757722433
00DE36CC23CCA011no


P-1 factor-bounds graph:
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2019-08-02T21:17:26+00:00