is 2 4498759 - 1
has 1354262 decimal digits
takes 0.561 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0803364C40A60012double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.604965.6716%250003625000.00781.3967%6.612866.1511%0.4795%
PrimeNet2610.068362.2951%190004000000.00723.0642%0.075563.4504%1.1553%
GPU722651.621764.6154%260005500000.00992.0909%1.631665.3553%0.7399%
Difference+2+4.9832+1.0563%-1000-187500-0.0020-0.6942%+4.9812+0.7959%+0.7959%

Known prime factors (1 factor, 72.2 bits, 0.00160399% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
449875952753440340061310485532272.160586311028664364
22 × 32 × 619 × 21023 × 1251527
2010-01-22210231251527329.650.01590.0230

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-10T18:28:00Carsten Kossendeydurandal25000362500---0.008--1.397%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-01-08T00:00:00ANONYMOUSv4_computers21261--0.068--


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)
2000-01-12T00:00:00ANONYMOUSv4_computers0803364C40A600120.561


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:40:21kkmrkkblmbrbkManual testing
5275344034006131048553
0E5E90B1CFE0EB__no
2018-02-17T02:09:06ATHec2-1xf
5275344034006131048553
0E5E90B1CFE0EB__no


P-1 factor-bounds graph:
B1 = 25000, B2 = 362500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
103
104
105
106
107
TF factor-bounds graph:
267
261
250
260
270
280
290
2100
Last modified: 2018-02-17T02:09:06+00:00