is 2 6978743 - 1
has 2100811 decimal digits
takes 1.522 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
Actual2674.257865.6716%----4.257865.6716%
Target2674.257865.6716%450009000000.02902.2394%4.286766.4404%
Difference----45000-900000-0.0290-2.2394%-0.0290-0.7688%

Known prime factors (2 factors, 103.0 bits, 0.00147534% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
69787433825467762891238.47727408
24 × 3 × 571		-165711.014e-81.462e-51.851e-5
6978743257835242423849082712064.4831847289994945
5 × 369457998989		2017-10-1953694579989890.64506,364.411,887

1 Composite Factors:
P-1 results:
No P-1 results for M6978743


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2017-10-19TJAOIManual testing264265*64.483200.1356.2850.558


ECM factoring results:
No ECM results for M6978743


Lucas-Lehmer results:
No L-L results for M6978743


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-24NetaniasWin10
382546776289
25783524242384908271
93340A89109903__no
2019-02-17J.R. Allenlapacer
382546776289
25783524242384908271
93340A8910990327no


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
265
this exponent TF target: 67
TF double-checked to: 67.7
250
260
270
Last modified: 2019-02-17T09:31:15+00:00