is 2 2796373 - 1
has 841793 decimal digits
takes 0.216 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L743DC5FFD9B8021Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26710.625967.1642%20482048000.00150.3003%10.627367.2628%0.0986%
PrimeNet2590.027562.7119%120002400000.00272.9264%0.030263.8031%1.0912%
GPU722630.570765.0794%150002600000.00321.7893%0.573965.7042%0.6248%
Difference+4+10.0551+2.0848%-12952-55200-0.0017-1.4890%+10.0534+1.5586%+1.5586%

Known prime factors (1 factor, 61.5 bits, 0.00219885% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
279637332342888688205006631961.488578300689647
35 × 6271 × 379499
2009-03-2062713794990.15900.00300.0043

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-11-28T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.300%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-02-14T07:18:00Sturle Sundegaudi.ifi260261--0.055--


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)
1999-07-12T00:00:00Stephen Woodv4_computers743DC5FFD9B8021D0.216


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-21T13:12:17Oliver KruseGTX-3
3234288868820500663
C0DD1AB02C7335__no
2017-12-06T13:55:49kkmrkkblmbrbkc4.xlarge
3234288868820500663
C0DD1AB02C7335__no


P-1 factor-bounds graph:
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
102
103
104
105
106
TF factor-bounds graph:
267
261
250
260
270
280
290
2100
Last modified: 2017-12-06T13:55:49+00:00