is 2 2665499 - 1
has 802396 decimal digits
takes 0.206 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7A9EC01EE5DAEFF5double-checked
PRP30FB601D5F7B962Fverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26822.361667.6471%2000000500000000.51696.8621%22.878569.8672%2.2201%
PrimeNet2590.028862.7119%110002000000.00242.7073%0.031263.7213%1.0095%
GPU722630.598865.0794%130002200000.00271.6206%0.601565.6453%0.5659%
Difference+5+21.7629+2.5677%+1987000+49780000+0.5141+5.2416%+22.2770+4.2219%+4.2219%

Known prime factors (1 factor, 95.9 bits, 0.00359797% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2665499741215138563525410395870050492995.90413903872006020737775476
22 × 132 × 31 × 1979 × 335259873788849
2020-08-1819793352598737888495.405e+92,045,6393,820,685

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-11-08T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.239%
2003-11-28T00:00:00Team Prime Ribv4_computers15000213750---0.003--0.780%
2010-12-21T22:27:00Jocelyn LaroucheManual testing2000020000---0.002--0.268%
2010-12-26T02:29:00Jocelyn LaroucheManual testing3000030000---0.003--0.370%
2011-02-03T14:32:00markrtiny1050002283750---0.025--2.547%
2014-11-06T23:05:00Jocelyn LaroucheManual testing129080129080---0.014--0.964%
2016-06-08T10:37:13Jocelyn LaroucheManual testing15198845675006---0.044--3.184%
2016-12-18T19:43:07Jocelyn Larouchelow 4M182385182385---0.020--1.163%
2017-01-10T10:25:00Jocelyn Larouchelow 4M218862218862---0.025--1.277%
2017-03-07T20:00:33Jocelyn Larouchelow 4M31516031516006---0.053--3.266%
2018-08-29T01:29:37Jocelyn Larouchelow 4M626630626630---0.070--2.065%
2018-08-30T21:10:20Jocelyn Larouchelow 4M630320630320---0.071--2.070%
2018-09-03T21:22:18Jocelyn Larouchelow 4M6303201260640---0.074--2.680%
2018-09-04T10:43:06Jocelyn Larouchelow 4M6303201890960---0.078--3.042%
2018-09-07T21:01:40Jocelyn Larouchelow 4M6303202521280---0.082--3.301%
2019-11-22T14:04:09masserManual testing20000005000000012---0.517--6.862%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1997-12-13T00:00:00JG12v4_computers21259--0.029--
2016-02-23T16:29:18Mark RoseManual testing259260--0.029--
2009-01-30T17:41:00Sturle Sundegolli.ifi260261--0.058--
2012-05-20T14:06:00markroldgamer261262--0.115--
2013-01-14T11:57:00dbaughManual testing262263--0.368--
2015-02-23T17:25:00VictordeHollanderManual testing263264--0.737--
2015-02-23T17:25:00VictordeHollanderManual testing264265--1.402--
2016-01-25T14:29:34ramgeisManual testing265266--2.804--
2017-09-08T08:21:19Gordon SpenceManual testing266267--5.607--
2019-04-29T13:20:18TJAOIManual testing267268--11.21--


ECM factoring results:

Old Calculation Method

Total ECM effort:4.755 GHz-days
Estimated T-Level:2.300
DigitsB1CurvesCompleteFacMiss
201100046 / 1000.46062.982%
255000046 / 2800.16484.825%

New Calculation Method

Total ECM effort:4.755 GHz-days
Estimated T-Level:2.300
DigitsB1CompleteFacMiss
20110001.48422.676%
25500000.13487.449%
302500000.00899.178%


ECM Summary

B1B2factorcurvesGHz-days
500005000000454.652
50000500000010.103


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-12-09T00:00:00JG12v4_computers7A9EC01EE5DAEFF50.206
1997-12-13T00:00:00JG12v4_computers7A9EC01EE5DAEFF50.206
1999-04-23T00:00:00ANONYMOUSv4_computers7A9EC01EE5DAEFF50.206
2018-07-23T04:05:08kkmrkkblmbrbkold7A9EC01EE5DAEFF50.206


PRP results:
dateuseridcompidcofactorsres64PRP
2020-08-18T15:21:04CrypticCluecruncher
74121513856352541039587005049
30FB601D5F7B962Fno


P-1 factor-bounds graph:
B1 = 2000000, B2 = 50000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 630320, B2 = 2521280 (P-1 stage 2)
B1 = 630320, B2 = 1890960 (P-1 stage 2)
B1 = 630320, B2 = 1260640 (P-1 stage 2)
B1 = 630320 (P-1 stage 1)
B1 = 626630 (P-1 stage 1)
B1 = 315160, B2 = 3151600 (P-1 stage 2)
B1 = 151988, B2 = 4567500 (P-1 stage 2)
B1 = 315160 (P-1 stage 1)
B1 = 105000, B2 = 2283750 (P-1 stage 2)
B1 = 218862 (P-1 stage 1)
B1 = 182385 (P-1 stage 1)
B1 = 151988 (P-1 stage 1)
B1 = 129080 (P-1 stage 1)
B1 = 105000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 15000, B2 = 213750 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-08-18T15:21:04+00:00