is 2 4614487 - 1
has 1389100 decimal digits
takes 0.608 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L76AA35790A40BD94double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.439365.6716%250003750000.00841.4171%6.447766.1581%0.4865%
PrimeNet2610.066662.2951%200004000000.00783.1123%0.074363.4686%1.1735%
GPU722651.581064.6154%280006000000.01132.1882%1.592365.3897%0.7743%
Difference+2+4.8582+1.0563%-3000-225000-0.0029-0.7711%+4.8553+0.7684%+0.7684%

Known prime factors (1 factor, 63.3 bits, 0.00137136% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4614487112077386469197701612063.2811214407868840
23 × 5 × 41521 × 731201
2010-05-16415217312010.37530.01510.0161

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-18T04:32:00Carsten Kossendeydurandal25000375000---0.008--1.417%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-08-17T00:00:00ANONYMOUSv4_computers21261--0.067--


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)
1998-03-31T00:00:00ANONYMOUSv4_computers76AA35790A40BD940.608


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:27:00kkmrkkblmbrbkManual testing
11207738646919770161
A73FA86CAA7358__no
2018-02-27T10:51:40treborLaptop
11207738646919770161
A73FA86CAA7358__no


P-1 factor-bounds graph:
B1 = 25000, B2 = 375000 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
103
104
105
106
TF factor-bounds graph:
267
261
250
260
270
280
290
2100
Last modified: 2018-02-27T10:51:40+00:00