is 2 4978069 - 1
has 1498549 decimal digits
takes 0.690 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L71534B0FAFDADCA3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.969065.6716%300004350000.01051.5762%5.979466.2127%0.5411%
PrimeNet2610.061762.2951%220004500000.00913.3108%0.070863.5434%1.2483%
GPU722651.465664.6154%340007000000.01412.4142%1.479765.4696%0.8543%
Difference+2+4.5034+1.0563%-4000-265000-0.0037-0.8380%+4.4997+0.7431%+0.7431%

Known prime factors (1 factor, 65.4 bits, 0.00131297% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4978069473756529502483852632065.3614758436750299
3 × 28097 × 56452489
2010-05-2428097564524892.31650.62351.1546

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-29T14:50:00Carsten Kossendeydurandal30000435000---0.010--1.576%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-12-08T01:07:00markroldgamer261262--0.062--


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)
2000-03-22T00:00:00ANONYMOUSv4_computers71534B0FAFDADCA30.690


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T16:59:36kkmrkkblmbrbkManual testing
47375652950248385263
54E435B6B06544__no
2018-04-22T19:50:08Oliver KruseGTX-1
47375652950248385263
54E435B6B06544__no


P-1 factor-bounds graph:
B1 = 30000, B2 = 435000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
103
104
105
106
107
108
TF factor-bounds graph:
267
262
250
260
270
280
290
2100
Last modified: 2018-04-22T19:50:08+00:00