is 2 1793387 - 1
has 539864 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LEDEDFBCD68FDF193double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.568668.6567%500000150000000.10155.0562%16.670170.2415%1.5848%
PrimeNet2570.010763.1579%80001400000.00122.8155%0.011964.1952%1.0373%
GPU722610.171365.5738%80001300000.00121.4940%0.172466.0881%0.5143%
Difference+6+16.3973+3.0829%+492000+14870000+0.1003+3.5623%+16.4976+4.1534%+4.1534%

Known prime factors (1 factor, 62.1 bits, 0.00346259% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
179338749346783994291433991962.0981375798530777
3 × 11 × 31 × 1344866599
2009-07-103113448665990.76875.763810.765

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:34:54alpertronManual testing5000001500000012---0.101--5.056%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.021--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.503 GHz-days
DigitsB1CurvesCompleteFacMiss
2011000283 / 1002.8305.818%
2550000283 / 2801.01136.330%

New Calculation Method

Total ECM effort:19.503 GHz-days
DigitsB1CompleteFacMiss
201100010.8850.002%
25500001.00736.527%
302500000.06493.845%
3510000000.00399.704%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000028319.50


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00Ethan O'Connorv4_computersEDEDFBCD68FDF1930.097


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T16:53:53Oliver KruseGTX-1
4934678399429143399
0C4979561659BD__no
2017-11-05T07:07:23kkmrkkblmbrbkc4.xlarge
4934678399429143399
0C4979561659BD__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2020-12-11T12:25:37+00:00