is 2 6928309 - 1
has 2085629 decimal digits
takes 1.511 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
Actual2674.288865.6716%----4.288865.6716%
Target2674.288865.6716%450009000000.02902.2367%4.317766.4395%
Difference----45000-900000-0.0290-2.2367%-0.0290-0.7678%

Known prime factors (2 factors, 107.4 bits, 0.00154963% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
69283091401444487902011546.99410113900
22 × 3 × 52 × 33713		-25337131.564e-60.00060.0011
692830914889929992144250711960.369107457173115
3 × 5 × 23 × 1087 × 286541		2016-02-0210872865410.03060.00530.0092

1 Composite Factors:
P-1 results:
No P-1 results for M6928309


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-02TJAOIManual testing260261*60.369190.0087.2950.041


ECM factoring results:
No ECM results for M6928309


Lucas-Lehmer results:
No L-L results for M6928309


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-23Oliver KruseGTX-3
140144448790201
1488992999214425071
1BAE84285D5703__no
2019-01-30Chang Chia-Tcheexbpc13
140144448790201
1488992999214425071
1BAE84285D5703AAno


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
106
TF factor-bounds graph:
261
this exponent TF target: 67
TF double-checked to: 67.8
250
260
270
Last modified: 2023-04-26T21:34:10+00:00