is 2 26408801 - 1
has 7949842 decimal digits
takes 24.446 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L4F3C27C3E759A4E8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27118.103064.7887%4050004050000.54361.7012%18.646665.3877%0.5990%
PrimeNet2660.559262.1212%12000045000000.48145.1936%1.040664.0885%1.9673%
GPU722709.048164.2857%19000055000000.64333.7919%9.691565.6400%1.3542%
Difference+1+9.0548+0.5030%+215000-5095000-0.0997-2.0907%+8.9551-0.2522%-0.7552%

Known prime factors (1 factor, 67.1 bits, 0.00025407% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
264088011578101537675325209212167.0972987832612460
22 × 5 × 17807 × 8389489
2011-11-171780783894891.89930.63611.1459

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-02-02T00:00:00Ignacio_Larrosav4_computers405000405000---0.544--1.701%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-11-17T00:16:00Carsten KossendeyManual testing??67.097210.77449.861.579
2004-05-11T00:00:00markrv4_computers21262--0.023--
2004-09-02T00:00:00ANONYMOUSv4_computers21267--1.125--
2011-11-17T00:15:00Carsten KossendeyManual testing267271--16.98--


ECM factoring results:
No ECM results for M26408801


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-02-18T00:00:00Ignacio_Larrosav4_computers4F3C27C3E759A4E824.45
2011-04-09T12:56:00ANONYMOUSE170BAEC9C0A06__24.45


PRP results:
No PRP results for M26408801


P-1 factor-bounds graph:
B1 = 405000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
271
267
262
2
250
260
270
280
290
2100
Last modified: 2011-11-17T00:16:15+00:00