is 2 26455739 - 1
has 7963971 decimal digits
takes 24.490 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF24B9F671CC563F1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27118.070964.7887%30500058712500.81643.7063%18.887366.0938%1.3050%
PrimeNet2660.558262.1212%12000045000000.48145.1948%1.039664.0889%1.9677%
GPU722709.032164.2857%19000055000000.64333.7928%9.675465.6403%1.3546%
Difference+1+9.0388+0.5030%+115000+371250+0.1731-0.0865%+9.2119+0.4535%+0.4535%

Known prime factors (1 factor, 67.2 bits, 0.00025413% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
264557391731697087544864403432167.2313272819344689
3 × 137 × 7963064099
2011-12-0813779630640991.7563582.341,087.6

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-05-12T00:00:00ANONYMOUSv4_computers3050005871250---0.816--3.706%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-12-08T14:15:00Carsten KossendeyManual testing??67.231210.63349.941.291
2004-06-04T00:00:00markrv4_computers21262--0.023--
2004-11-22T00:00:00ANONYMOUSv4_computers21267--1.123--
2011-12-08T14:12:00Carsten KossendeyManual testing267271--16.95--


ECM factoring results:
No ECM results for M26455739


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-07-01T00:00:00ANONYMOUSv4_computersF24B9F671CC563F124.49


PRP results:
No PRP results for M26455739


P-1 factor-bounds graph:
B1 = 305000, B2 = 5871250 (P-1 stage 2)
B1 = 305000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
271
267
262
2
250
260
270
280
290
2100
Last modified: 2011-12-08T14:15:00+00:00