is 2 6987703 - 1
has 2103509 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
Actual2688.530066.1765%----8.530066.1765%
Target2674.252365.6716%450009000000.02902.2399%4.281366.4406%
Difference+1+4.2777+0.5048%-45000-900000-0.0290-2.2399%+4.2487-0.2641%

Known prime factors (3 factors, 157.5 bits, 0.00225441% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6987703740696519929.46453
53		-1531.035e-111.212e-61.810e-6
698770315001740685007956311960.380107343863105
5 × 571 × 37598551		2016-02-03571375985510.03090.64791.2097
69877032376028716358639871512167.68717001500467025
52 × 680060018681		2023-02-07256800600186814.534711,71521,880

4 Composite Factors:
P-1 results:
No P-1 results for M6987703


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-03TJAOIManual testing260261*60.380190.0097.2850.042
2023-02-07TJAOIManual testing267268*67.687210.2823.0760.570


ECM factoring results:
No ECM results for M6987703


Lucas-Lehmer results:
No L-L results for M6987703


PRP results:
dateuseridcompidcofactorsres64PRP
2018-01-28ANONYMOUSdory
740696519
1500174068500795631
A54D2C62B1E5A7__no
2019-03-10Chang Chia-Tcheexbpc13
740696519
1500174068500795631
A54D2C62B1E5A75Ano
2023-02-12HMJ ZanenLeslie
740696519
1500174068500795631
237602871635863987151
A54D2C62B1E5A75Ano


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
268
261
this exponent TF target: 67
TF double-checked to: 67.8
250
260
270
Last modified: 2023-04-26T21:34:10+00:00