is 2 6678877 - 1
has 2010543 decimal digits
takes 1.252 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L993E007ECD8E7748double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.448965.6716 %30000300000.00820.5327 %4.457165.8545 %
Target2674.448965.6716 %4000040000000.06952.0997 %4.518466.3924 %
Difference----10000-3970000-0.0614-1.5670 %-0.0614-0.5379 %

Known prime factors (1 factor, 77.7 bits, 0.00116324% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
66788772439861398562504614486332477.69118265506301152908
22 × 7 × 1109 × 363619 × 1617691
2011-08-0736361916176916,138.20.11740.2011

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-07-17Stephen Woodv4_computers3000030000--0.0080.533%
2011-08-07Carsten Kossendeymother2477.6910.2980.000%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-09-20ANONYMOUSv4_computers212620.069
2004-05-25David Campeauv4_computers212630.147


ECM factoring results:
No ECM results for M6678877


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30ANONYMOUSv4_computers993E007ECD8E77481.252
2001-10-27Stephen Woodv4_computers993E007ECD8E77481.252


PRP results:
dateuseridcompidcofactorsres64
2018-01-03Oliver KruseGTX-1
243986139856250461448633
D825FB64FFAF3F70
2018-11-23kkmrkkblmbrbkc5.large
243986139856250461448633
D825FB64FFAF3F70


CERT results:
No CERT results for M6678877


P-1 factor-bounds graph:
B1 = 30000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
263
262
this exponent TF target: 67
TF double-checked to: 67
250
260
270
280
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00