is 2 1330867 - 1
has 400631 decimal digits
takes 0.051 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L74D855AF2D45ED5Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual270179.545170.0000%500000150000000.07143.6255%179.616571.0876%1.0876%
PrimeNet2560.007262.5000%60001000000.00062.6056%0.007863.4771%0.9771%
GPU722600.115465.0000%5500400000.00040.9784%0.115865.3425%0.3425%
Difference+10+179.4297+5.0000%+494500+14960000+0.0710+2.6471%+179.5007+5.7452%+5.7452%

Known prime factors (1 factor, 74.0 bits, 0.00555859% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1330867185968744264964320930632373.9776986751653807793
33 × 72 × 31 × 37 × 103 × 44700751
2014-02-18103447007512,306.30.13480.2518

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers15000213750---0.001--0.489%
2016-03-17T19:05:05alpertronManual testing5000001500000012---0.071--3.625%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers21257--0.014--
2003-06-23T00:00:00ANONYMOUSv4_computers21258--0.029--
2022-03-07T17:32:34LordJuliusManual testing258260--0.087--
2009-02-15T23:37:00Sturle Sundescarpia.ifi260261--0.115--
2012-09-01T08:44:00lycornManual testing261264--2.444--
2013-10-19T11:56:00David CampeauManual testing264265--2.807--
2014-02-04T13:10:00Never Odd Or EvenManual testing265266--5.615--
2014-02-04T13:10:00Never Odd Or EvenManual testing266267--11.23--
2014-02-04T13:10:00Never Odd Or EvenManual testing267268--22.46--
2014-02-04T13:10:00Never Odd Or EvenManual testing268269--44.92--
2014-02-04T13:10:00Never Odd Or EvenManual testing269270--89.84--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.093 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000300 / 1003.0004.904%
2550000300 / 2801.07134.186%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.093 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.6150.000%
25500001.64719.258%
302500000.14186.886%
3510000000.01099.022%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025011.66
250000350000005013.43


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-03-17T00:00:00Bruce A Metcalfv4_computers74D855AF2D45ED5C0.051


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T04:40:15Oliver KruseGTX-2
18596874426496432093063
793E6CA98E5FFB__no
2017-10-23T19:59:53kkmrkkblmbrbkc4.xlarge
18596874426496432093063
793E6CA98E5FFB__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 213750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
270
269
268
267
266
265
264
261
260
258
257
250
260
270
280
290
2100
Last modified: 2022-03-07T17:32:34+00:00