is 2 26118661 - 1
has 7862501 decimal digits
takes 22.382 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6E101AC1C5CC2195double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27118.304164.7887%3850003850000.47841.6602%18.782565.3733%0.5846%
PrimeNet2660.565462.1212%12000045000000.44565.1860%1.011164.0856%1.9644%
GPU722709.148764.2857%19000055000000.59563.7863%9.744265.6380%1.3522%
Difference+1+9.1554+0.5030%+195000-5115000-0.1172-2.1260%+9.0383-0.2646%-0.7676%

Known prime factors (1 factor, 67.2 bits, 0.00025729% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
261186611696311116605905093432167.2013247316385411
3 × 7 × 154634113591
2011-10-1471546341135911.715110,46919,552

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-01-10T00:00:00WWU-CSv4_computers385000385000---0.478--1.660%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-10-14T03:11:00Carsten KossendeyManual testing??67.201210.57745.661.178
2004-07-13T00:00:00ANONYMOUSv4_computers21267--1.138--
2011-10-14T03:11:00Carsten KossendeyManual testing267271--17.17--


ECM factoring results:
No ECM results for M26118661


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-01-20T00:00:00WWU-CSv4_computers6E101AC1C5CC219522.38


PRP results:
No PRP results for M26118661


P-1 factor-bounds graph:
B1 = 385000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
271
267
2
250
260
270
280
290
2100
Last modified: 2011-10-14T03:11:45+00:00