is 2 6056221 - 1
has 1823105 decimal digits
takes 1.073 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3F18750080F29469double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.906365.6716%300003600000.01231.5467%4.918766.2026%0.5310%
PrimeNet2620.101462.9032%260006000000.01473.3348%0.116264.1403%1.2371%
GPU722662.438665.1515%400009000000.02232.4209%2.460965.9952%0.8436%
Difference+1+2.4678+0.5201%-10000-540000-0.0100-0.8741%+2.4578+0.2075%+0.2075%

Known prime factors (1 factor, 65.8 bits, 0.00108671% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6056221648550056528640253592065.8145354412070899
3 × 31 × 601 × 95797543
2011-07-31601957975432.08041.34142.5050

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-15T00:00:00ANONYMOUSv4_computers30000360000---0.012--1.547%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-04-27T00:00:00ANONYMOUSv4_computers21262--0.101--


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)
1999-02-07T00:00:00netconxv4_computers3F18750080F294691.073
2001-06-03T00:00:00ANONYMOUSv4_computers3F18750080F294691.073


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:42:39kkmrkkblmbrbkManual testing
64855005652864025359
D3017D44A82515__no
2018-09-16T14:10:35ANONYMOUS
64855005652864025359
D3017D44A82515__no


P-1 factor-bounds graph:
B1 = 30000, B2 = 360000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
101
102
103
104
105
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
262
250
260
270
280
290
2100
Last modified: 2018-09-16T14:10:35+00:00