is 2 4292567 - 1
has 1292192 decimal digits
takes 0.535 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB35288E0C2BAB41Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.922265.6716%250003375000.00761.3560%6.929866.1371%0.4655%
PrimeNet2610.071662.2951%180003600000.00662.9250%0.078263.3979%1.1029%
GPU722651.699664.6154%240004500000.00851.9268%1.708165.2972%0.6818%
Difference+2+5.2226+1.0563%+1000-112500-0.0009-0.5708%+5.2216+0.8400%+0.8400%

Known prime factors (1 factor, 80.2 bits, 0.00186850% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
429256713951759647776715139465672580.207162510680063662549
127 × 881 × 115547 × 12570241
2009-12-121155471257024193,2090.14360.2313

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-01T23:37:00Carsten Kossendeydurandal25000337500---0.008--1.356%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-23T00:00:00ANONYMOUSv4_computers21260--0.036--
2002-01-08T00:00:00ANONYMOUSv4_computers21261--0.072--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-04-15T00:00:00ANONYMOUSv4_computersB35288E0C2BAB41A0.535
2000-05-17T00:00:00ANONYMOUSv4_computersB35288E0C2BAB41A0.535


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:13:30kkmrkkblmbrbkManual testing
1395175964777671513946567
CD5EEA4C635C45__no
2018-01-27T03:39:19ATHec2-1xf
1395175964777671513946567
CD5EEA4C635C45__no


P-1 factor-bounds graph:
B1 = 25000, B2 = 337500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
261
260
250
260
270
280
290
2100
Last modified: 2018-01-27T03:39:19+00:00