is 2 1425649 - 1
has 429164 decimal digits
takes 0.054 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8EC6465A1C894009double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.842468.6567%2500000625000000.31947.3940%21.161870.9742%2.3175%
PrimeNet2560.006762.5000%65001100000.00072.7719%0.007463.5395%1.0395%
GPU722600.107765.0000%6000800000.00061.3028%0.108365.4560%0.4560%
Difference+7+20.7346+3.6567%+2494000+62420000+0.3188+6.0912%+21.0535+5.5183%+5.5183%

Known prime factors (1 factor, 86.0 bits, 0.00603489% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1425649793457822433649900342198012686.03627827951425408705100
22 × 52 × 278279514254087051
2017-01-312527827951425408705117,749,822839,364,4501.568e+9

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000240000---0.002--0.832%
2009-08-02T10:24:00markrlounge2000005000000---0.026--3.477%
2014-11-10T23:29:00Jocelyn LaroucheManual testing245021245021---0.014--1.384%
2015-01-15T22:03:00Jocelyn LaroucheManual testing367531367531---0.020--1.677%
2015-02-15T21:12:00Jocelyn LaroucheManual testing404284404284---0.022--1.751%
2015-02-20T16:55:00Jocelyn LaroucheManual testing444712444712---0.025--1.826%
2015-02-27T19:06:00Jocelyn LaroucheManual testing489183489183---0.027--1.904%
2015-03-05T14:27:00Jocelyn LaroucheManual testing538101538101---0.030--1.983%
2015-03-12T10:39:00Jocelyn LaroucheManual testing591911591911---0.033--2.064%
2015-03-18T11:25:00alpertronManual testing200000060000000---0.286--7.216%
2016-08-17T16:41:54Bruno Victal5820K-factoring25000006250000012---0.319--7.394%
2016-08-27T10:53:42Bruno VictalManual testing25000006250000012---0.319--7.394%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-20T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.027--
2016-02-23T16:28:31Mark RoseManual testing258260--0.081--
2009-02-26T02:26:00Sturle Sundeothello.ifi260261--0.108--
2016-02-23T16:28:31Mark RoseManual testing261262--0.215--
2011-05-07T23:53:00GrunwalderGIMPManual testing21263--1.120--
2016-02-23T16:28:31Mark RoseManual testing262263--0.689--
2015-03-18T22:08:00snme2pm1Manual testing263264--1.377--
2015-03-18T22:08:00snme2pm1Manual testing264265--2.621--
2015-10-02T08:43:14ramgeisManual testing265266--5.242--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.451 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:25.451 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025011.80
50000500000010.047
250000350000005013.60


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-10-19T00:00:00ANONYMOUSv4_computers8EC6465A1C8940090.054
2016-06-02T10:52:16MadPooManual testing8EC6465A1C8940090.054


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T20:50:03Oliver KruseGTX-1
79345782243364990034219801
D0D95890C37965__no
2017-10-26T16:37:51kkmrkkblmbrbkc4.xlarge
79345782243364990034219801
D0D95890C37965__no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 591911 (P-1 stage 1)
B1 = 538101 (P-1 stage 1)
B1 = 489183 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 444712 (P-1 stage 1)
B1 = 404284 (P-1 stage 1)
B1 = 367531 (P-1 stage 1)
B1 = 245021 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 15000, B2 = 240000 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
257
250
260
270
280
290
2100
Last modified: 2022-03-31T09:31:52+00:00