is 2 759229 - 1
has 228551 decimal digits
takes 0.015 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L979A08BD9B50FE__double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26739.137070.1493%500000150000000.03744.5545%39.174371.5088%1.3595%
PrimeNet2400.000050.0000%70002800000.000621.9856%0.000660.9928%10.9928%
GPU722440.000054.5455%130005000000.001117.0188%0.001162.2813%7.7358%
Difference+23+39.1370+15.6038%+487000+14500000+0.0362-12.4643%+39.1732+9.2275%+9.2275%

Known prime factors (1 factor, 58.2 bits, 0.00767141% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7592293412404510253821591858.244224728277651
1999 × 112420349
2007-08-3119991124203490.06780.17740.3313

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-02T00:00:00ANONYMOUSv4_computers2000200000---0.000--0.200%
2002-02-03T00:00:00ANONYMOUSv4_computers4096409600---0.001--0.429%
2002-03-24T00:00:00ANONYMOUSv4_computers8192819200---0.002--0.775%
2002-05-18T00:00:00ANONYMOUSv4_computers163841638400---0.003--1.260%
2002-07-20T00:00:00ANONYMOUSv4_computers327683276800---0.006--1.892%
2002-12-02T00:00:00ANONYMOUSv4_computers655376553700---0.012--2.665%
2003-07-06T00:00:00ANONYMOUSv4_computers13107213107200---0.024--3.565%
2016-03-17T18:52:00alpertronManual testing5000001500000012---0.037--4.554%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-09-15T00:00:00ANONYMOUSv4_computers21255--0.006--
2001-03-11T00:00:00ANONYMOUSv4_computers21256--0.013--
2001-12-08T00:00:00ANONYMOUSv4_computers21257--0.025--
2003-09-29T00:00:00ANONYMOUSv4_computers21258--0.051--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.385 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:11.385 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002816.386
25000025000000445.000


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-10-26T00:00:00ANONYMOUSv4_computers979A08BD9B50FE__0.015


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-27T22:57:29Oliver KruseGTX-2
341240451025382159
CFBA2241241AFD__no
2017-10-13T17:58:37Oliver KruseThreadripperCFBA2241241AFD__no
2017-12-17T09:04:16ATHec2-1xf
341240451025382159
CFBA2241241AFD__no
2020-04-20T23:44:04Oliver KruseAddPrpType5
341240451025382159
1CFF1AEB96B936__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 65537, B2 = 6553700 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 65537 (P-1 stage 1)
B1 = 8192, B2 = 819200 (P-1 stage 2)
B1 = 32768 (P-1 stage 1)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 16384 (P-1 stage 1)
B1 = 2000, B2 = 200000 (P-1 stage 2)
B1 = 8192 (P-1 stage 1)
B1 = 4096 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
258
257
256
255
250
260
270
280
290
2100
Last modified: 2020-04-20T23:44:04+00:00