is 2 1350779 - 1
has 406625 decimal digits
takes 0.052 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8C9CFC300273ADA6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26721.997668.6567%500000150000000.07144.8860%22.069070.1882%1.5314%
PrimeNet2560.007162.5000%60001000000.00062.6133%0.007763.4800%0.9800%
GPU722600.113765.0000%5500400000.00040.9818%0.114165.3436%0.3436%
Difference+7+21.8839+3.6567%+494500+14960000+0.0710+3.9042%+21.9549+4.8445%+4.8445%

Known prime factors (1 factor, 101.0 bits, 0.00748068% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1350779261999548305329593724415422220731101.047969809081668169233177357
11 × 17041 × 394717 × 808559 × 16210669
2014-07-20808559162106691.004e+110.09120.0913

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00Team Prime Ribv4_computers15000217500---0.001--0.798%
2014-04-28T23:56:00ANONYMOUSManual testing175000175000---0.010--1.156%
2014-07-20T00:27:00mikrMSI5000001500000031101.0470.0710.1030.1434.886%
2016-03-17T19:05:22alpertronManual testing5000001500000012---0.071--4.886%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-04T00:00:00ANONYMOUSv4_computers21257--0.014--
2003-06-30T00:00:00ANONYMOUSv4_computers21258--0.028--
2022-03-07T17:32:36LordJuliusManual testing258260--0.085--
2009-02-17T06:32:00Sturle Sundegibus.ifi260261--0.114--
2011-05-09T14:43:00XyzzyManual testing261262--0.227--
2013-01-14T11:53:00dbaughManual testing262263--0.727--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.205 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.205 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025111.74
250000350000005013.47


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-01-05T00:00:00JG12v4_computers8C9CFC300273ADA60.052
1998-08-09T00:00:00JG12v4_computers8C9CFC300273ADA60.052
2010-02-25T04:36:00Bruce A Metcalfv4_computers8C9CFC300273ADA60.052
2010-03-17T00:00:00Bruce A Metcalfv4_computers8C9CFC300273ADA60.052


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T07:29:04Oliver KruseGTX-3
2619995483053295937244154222207
B395D0FB772472__no
2017-10-24T14:31:18kkmrkkblmbrbkc4.xlarge
2619995483053295937244154222207
B395D0FB772472__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 175000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
263
262
261
260
258
257
250
260
270
280
290
2100
2110
Last modified: 2022-03-07T17:32:36+00:00