is 2 6915619 - 1
has 2081809 decimal digits
takes 1.508 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
Actual2674.296665.6716%----4.296665.6716%
Target2674.296665.6716%450009000000.02902.2361%4.325666.4392%
Difference----45000-900000-0.0290-2.2361%-0.0290-0.7676%

Known prime factors (3 factors, 146.0 bits, 0.00211131% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6915619497924569928.89136
22 × 32		-995.211e-122.846e-65.791e-6
6915619360857886970542471755.0022609006417
61 × 829 × 51593		2015-08-06829515930.00070.00110.0017
691561949996217261011910171962.117361473190332
22 × 3 × 4493 × 6704377		2016-06-30449367043770.12980.11680.2157

4 Composite Factors:
P-1 results:
No P-1 results for M6915619


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-12-31TJAOIManual testing255256*55.002172.55381e-67.3401.24308e-5
2016-06-30TJAOIManual testing262263*62.117190.0417.1110.193


ECM factoring results:
No ECM results for M6915619


Lucas-Lehmer results:
No L-L results for M6915619


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-10kkmrkkblmbrbkManual testing
497924569
36085788697054247
4999621726101191017
9588B218049127__no
2019-01-25krackerGRID-11
497924569
36085788697054247
4999621726101191017
9588B218049127F9no


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
106
107
TF factor-bounds graph:
263
256
this exponent TF target: 67
TF double-checked to: 67.8
250
260
270
Last modified: 2023-04-26T21:34:10+00:00