is 2 2765303 - 1
has 832440 decimal digits
takes 0.214 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCD616E6060C0D77Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26710.745367.1642%20482048000.00150.2993%10.746767.2625%0.0983%
PrimeNet2590.027862.7119%120002200000.00262.8553%0.030463.7766%1.0647%
GPU722630.577265.0794%150002400000.00311.7457%0.580265.6890%0.6096%
Difference+4+10.1681+2.0848%-12952-35200-0.0016-1.4463%+10.1665+1.5735%+1.5735%

Known prime factors (1 factor, 65.8 bits, 0.00237970% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2765303645020743146734064732065.80611662749853212
22 × 3 × 971895821101
2009-03-1549718958211012.99635,930.211,076

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-11-16T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.299%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-01-31T04:30:00Sturle Sundegofy.ifi260261--0.056--


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)
1999-07-30T00:00:00ANONYMOUSv4_computersCD616E6060C0D77F0.214


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-20T22:28:32Oliver KruseGTX-1
64502074314673406473
55B659650AE17B__no
2017-12-06T00:23:23kkmrkkblmbrbkc4.xlarge
64502074314673406473
55B659650AE17B__no


P-1 factor-bounds graph:
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
100
101
102
103
104
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
261
250
260
270
280
290
2100
Last modified: 2017-12-06T00:23:23+00:00