is 2 1492649 - 1
has 449333 decimal digits
takes 0.067 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L690333B4C293B4E6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26719.906868.6567%500000150000000.08354.9454%19.990470.2068%1.5501%
PrimeNet2570.012963.1579%65001000000.00082.3381%0.013664.0193%0.8614%
GPU722610.205865.5738%6000500000.00050.9469%0.206365.8998%0.3260%
Difference+6+19.7010+3.0829%+494000+14950000+0.0830+3.9985%+19.7840+4.3070%+4.3070%

Known prime factors (1 factor, 65.5 bits, 0.00439015% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1492649532567190554429635592065.53017839665941371
131 × 136180656041
2014-09-191311361806560416.9369480.54897.51

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000280000---0.002--0.976%
2011-12-07T02:25:00markrtiny2750006000000---0.038--3.813%
2016-03-17T19:15:24alpertronManual testing5000001500000012---0.084--4.945%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2022-03-08T19:08:32LordJuliusManual testing258260--0.077--
2010-05-06T00:20:00Architects Cubedm1_fw260261--0.103--
2011-05-28T03:14:00GrunwalderGIMPManual testing21263--1.069--


ECM factoring results:

Old Calculation Method

Total ECM effort:31.104 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:31.104 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.39024.916%
302500000.11689.004%
3510000000.00899.198%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025013.92
50000500000010.056
250000400000005017.13


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computers690333B4C293B4E60.067


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:23:44alpertronManual testing
53256719055442963559
973876354180E4__no
2017-10-18T07:35:15Oliver KruseThreadripper
53256719055442963559
973876354180E4__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 275000 (P-1 stage 1)
B1 = 20000, B2 = 280000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
263
261
260
258
250
260
270
280
290
2100
Last modified: 2022-03-08T19:08:32+00:00