is 2 6947207 - 1
has 2091318 decimal digits
takes 1.515 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.277165.6716%----4.277165.6716%
Target2674.277165.6716%450009000000.02902.2377%4.306166.4398%
Difference----45000-900000-0.0290-2.2377%-0.0290-0.7682%

Known prime factors (3 factors, 152.3 bits, 0.00219267% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6947207429137313038411445.2873088560
24 × 3 × 5 × 17 × 757
-177571.025e-61.812e-52.440e-5
6947207643994556536391445.8724634917
7 × 19 × 34849
2008-09-0819348498.290e-70.00060.0011
694720725951591994559455691961.171186777160912
24 × 37 × 223 × 379 × 3733
2016-04-0737937330.08430.00020.0002

4 Composite Factors:
P-1 results:
No P-1 results for M6947207


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-08Will EdgingtonManual testing??45.872141.54361e-77.3367.47493e-7
2016-04-07TJAOIManual testing261262*61.171190.0407.2470.192


ECM factoring results:
No ECM results for M6947207


Lucas-Lehmer results:
No L-L results for M6947207


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-19kkmrkkblmbrbkc4.xlarge
42913731303841
64399455653639
2595159199455945569
7BA0C2ECC25719__no
2019-02-07arnaudstm-11-010
42913731303841
64399455653639
2595159199455945569
7BA0C2ECC257192Fno


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
TF factor-bounds graph:
262
2
this exponent TF target: 67
TF double-checked to: 67.8
250
260
270
Last modified: 2023-04-26T21:34:10+00:00