is 2 26345213 - 1
has 7930700 decimal digits
takes 24.388 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF94EDA182B9B4473double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27118.146764.7887%4050004050000.54361.7005%18.690365.3875%0.5988%
PrimeNet2660.560662.1212%12000045000000.48145.1919%1.042064.0878%1.9666%
GPU722709.070064.2857%19000055000000.64333.7907%9.713365.6395%1.3538%
Difference+1+9.0767+0.5030%+215000-5095000-0.0997-2.0901%+8.9770-0.2520%-0.7550%

Known prime factors (1 factor, 68.4 bits, 0.00025958% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
263452133859438797079286365512168.3877324743962175
3 × 52 × 173 × 564527473
2012-01-031735645274732.387741.28477.107

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-06-05T00:00:00Phantomasv4_computers405000405000---0.544--1.701%
2012-01-03T11:38:00Carsten KossendeyManual testing4050004050002168.3870.54448.781.0871.701%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2004-07-26T00:00:00Helgenv4_computers21267--1.128--
2011-10-19T14:41:00ChuckManual testing267268--1.135--
2012-01-02T22:42:00Carsten KossendeyManual testing268271--15.88--


ECM factoring results:
No ECM results for M26345213


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2006-02-01T00:00:00Phantomasv4_computersF94EDA182B9B447324.39


PRP results:
No PRP results for M26345213


P-1 factor-bounds graph:
B1 = 405000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
271
268
267
250
260
270
280
290
2100
Last modified: 2012-01-03T11:38:56+00:00