is 2 4014763 - 1
has 1208565 decimal digits
takes 0.501 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L94C4992E2A6170F1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677.401267.1642%12000030000000.05013.3090%7.451268.2507%1.0865%
PrimeNet2610.076563.9344%160003200000.00592.7297%0.082464.9189%0.9845%
GPU722651.817266.1538%220003600000.00731.7503%1.824566.7463%0.5924%
Difference+2+5.5839+1.0103%+98000+2640000+0.0428+1.5586%+5.6267+1.5044%+1.5044%

Known prime factors (1 factor, 79.8 bits, 0.00198870% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
401476310831707969603104777531932579.842134898473080516892
22 × 41 × 73 × 806513 × 13971047
2009-11-228065131397104748,1330.27560.2968

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-06-06T19:10:00markrlounge1200003000000---0.050--3.309%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21261--0.077--
2009-11-07T22:22:00GrunwalderGIMPManual testing21263--0.398--


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)
1998-07-29T00:00:00ANONYMOUSv4_computers94C4992E2A6170F10.501
1999-09-30T00:00:00ANONYMOUSv4_computers94C4992E2A6170F10.501


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-12T23:54:44Oliver KruseGTX-3
1083170796960310477753193
4AED3E79D0B272__no
2017-12-20T05:19:24kkmrkkblmbrbkc4.xlarge
1083170796960310477753193
4AED3E79D0B272__no


P-1 factor-bounds graph:
B1 = 120000, B2 = 3000000 (P-1 stage 2)
B1 = 120000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
267
263
261
250
260
270
280
290
2100
Last modified: 2017-12-20T05:19:24+00:00