is 2 6928973 - 1
has 2085829 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
Actual2674.288465.6716%----4.288465.6716%
Target2674.288465.6716%450009000000.02902.2368%4.317366.4395%
Difference----45000-900000-0.0290-2.2368%-0.0290-0.7678%

Known prime factors (1 factor, 56.9 bits, 0.00082119% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
69289731344423354499901591856.9009701461923
3 × 56171 × 57571		1998-07-2156171575710.00210.01780.0361

P-1 results:
No P-1 results for M6928973


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-21Michael Bahlenv4_computers??56.900180.0017.3360.004
1999-05-16Michael Bahlenv4_computers??56.900180.0017.3360.004
1999-11-24Michael Bahlenv4_computers??56.900180.0017.3360.004
2000-11-15Michael Bahlenv4_computers??56.900180.0017.3360.004
2001-05-13Michael Bahlenv4_computers??56.900180.0017.3360.004
2001-09-30Michael Bahlenv4_computers??56.900180.0017.3360.004


ECM factoring results:
No ECM results for M6928973


Lucas-Lehmer results:
No L-L results for M6928973


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-23Oliver KruseGTX-2
134442335449990159
FE4775940BF375__no
2019-01-30Chang Chia-Tcheexbpc13
134442335449990159
FE4775940BF375FFno


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