is 2 6986761 - 1
has 2103225 decimal digits
takes 1.524 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
Actual2674.252965.6716%----4.252965.6716%
Target2674.252965.6716%450009000000.02902.2398%4.281866.4405%
Difference----45000-900000-0.0290-2.2398%-0.0290-0.7689%

Known prime factors (3 factors, 149.1 bits, 0.00213455% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6986761111788177926.7368
23		-881.282e-122.529e-65.148e-6
69867611039295173083028491856.5287437603584
28 × 3011 × 9649		2015-08-06301196490.00260.00110.0019
6986761675012696705775511112065.8724830655411755
32 × 5 × 107347898039		2019-06-1991073478980391.54771,849.23,453.8

4 Composite Factors:
P-1 results:
No P-1 results for M6986761


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2015-04-10TJAOIManual testing256257*56.528180.0017.3260.006
2022-03-20LordJuliusManual testing2126356.528180.0037.3260.013
2022-03-20LordJuliusManual testing2126326.73691.28180e-127.3296.16612e-12
2022-03-20LordJuliusManual testing263264--0.281--
2022-03-20LordJuliusManual testing264265--0.535--
2019-06-19TJAOIManual testing265266*65.872200.5045.2151.724


ECM factoring results:
No ECM results for M6986761


Lucas-Lehmer results:
No L-L results for M6986761


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-26treborDesktop
111788177
103929517308302849
1F5D1A9344E63B__no
2019-02-19ATHec2-PRPCFDC
111788177
103929517308302849
1F5D1A9344E63B2Dno
2019-06-20Niels_Mache_NextcloudSuperDry-X
111788177
103929517308302849
67501269670577551111
1F5D1A9344E63B2Dno


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
266
265
264
263
257
this exponent TF target: 67
TF double-checked to: 67.8
250
260
270
Last modified: 2023-04-26T21:34:10+00:00