is 2 1694051 - 1
has 509961 decimal digits
takes 0.080 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF7FFE7AC8A2D359Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.540268.6567%500000150000000.08805.0216%17.628270.2307%1.5739%
PrimeNet2570.011363.1579%80001300000.00102.7295%0.012364.1635%1.0056%
GPU722610.181365.5738%70001000000.00081.3003%0.182266.0214%0.4477%
Difference+6+17.3588+3.0829%+493000+14900000+0.0872+3.7213%+17.4460+4.2092%+4.2092%

Known prime factors (1 factor, 67.7 bits, 0.00399919% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16940512478901873460115148072167.74873164912787753
2361167 × 30986759
2014-09-0423611673098675925.8390.26760.3279

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-26T00:24:00Jocelyn LaroucheManual testing5000050000---0.003--0.570%
2011-02-12T05:42:00Carsten Kossendeyleela900001485000---0.011--2.342%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.882%
2014-04-29T21:12:00Jocelyn LaroucheManual testing150000150000---0.010--1.107%
2016-03-17T19:18:50alpertronManual testing5000001500000012---0.088--5.022%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-03-16T00:00:00ANONYMOUSv4_computers21258--0.023--
2010-04-25T16:50:00Architects Cubedm1_tt260261--0.091--
2010-09-26T01:51:00GrunwalderGIMPManual testing21263--0.942--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.914 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.914 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024914.80
50000500000020.119


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28T00:00:00ANONYMOUSv4_computersF7FFE7AC8A2D359A0.080


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T02:42:20Oliver KruseGTX-1
247890187346011514807
FCD03C3D3F2AA9__no
2017-11-03T12:42:22kkmrkkblmbrbkc4.xlarge
247890187346011514807
FCD03C3D3F2AA9__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 90000, B2 = 1485000 (P-1 stage 2)
B1 = 150000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
267
263
261
258
257
250
260
270
280
290
2100
Last modified: 2020-01-27T11:15:03+00:00