is 2 2684093 - 1
has 807993 decimal digits
takes 0.207 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L605A2564932B49C9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.070467.1642%2000000600000000.57797.7030%11.648369.6935%2.5293%
PrimeNet2590.028662.7119%120002200000.00262.8400%0.031263.7708%1.0590%
GPU722630.594665.0794%130002200000.00271.6228%0.597365.6461%0.5667%
Difference+4+10.4758+2.0848%+1987000+59780000+0.5752+6.0802%+11.0509+4.0475%+4.0475%

Known prime factors (1 factor, 68.1 bits, 0.00253741% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
26840933177420329533660236892168.10659189833018708
22 × 72 × 301988943973
2017-11-154930198894397334.4901,842.63,441.5

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-11-08T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.297%
2003-11-28T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.919%
2010-11-20T12:25:00Jocelyn LaroucheManual testing2000020000---0.002--0.319%
2010-12-04T09:46:00markrtiny1050002283750---0.025--2.866%
2016-06-15T12:00:40Jocelyn LaroucheManual testing16180445675006---0.045--3.596%
2016-12-19T18:37:56Jocelyn Larouchelow 4M194164194164---0.022--1.370%
2017-01-10T10:25:17Jocelyn Larouchelow 4M232996232996---0.026--1.499%
2017-04-07T19:41:23Jocelyn Larouchelow 4M33551433551406---0.056--3.714%
2019-07-04T12:48:34alpertronManual testing20000006000000012---0.578--7.703%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:19Mark RoseManual testing21260--0.057--
2009-01-31T00:48:00Sturle Sundegoober.ifi260261--0.057--
2012-05-11T12:38:00markroldgamer261262--0.114--
2013-01-14T12:26:00dbaughManual testing262263--0.366--
2015-02-23T17:25:00VictordeHollanderManual testing263264--0.731--
2015-02-23T17:25:00VictordeHollanderManual testing264265--1.392--
2016-01-26T10:48:52ramgeisManual testing265266--2.784--
2017-09-13T08:55:33Gordon SpenceManual testing266267--5.568--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.691 GHz-days
Estimated T-Level:1.300
DigitsB1CurvesCompleteFacMiss
201100026 / 1000.26077.004%
255000026 / 2800.09391.117%

New Calculation Method

Total ECM effort:2.691 GHz-days
Estimated T-Level:1.300
DigitsB1CompleteFacMiss
20110000.83943.227%
25500000.07692.700%
302500000.00599.534%


ECM Summary

B1B2factorcurvesGHz-days
500005000000242.484
50000500000020.207


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13T00:00:00foxkidv4_computers605A2564932B49C90.207


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-16T12:39:42kkmrkkblmbrbkc4.xlarge
317742032953366023689
9C4AE9101DD600__no
2017-11-16T23:53:05Oliver KruseGTX-3
317742032953366023689
9C4AE9101DD600__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 335514, B2 = 3355140 (P-1 stage 2)
B1 = 161804, B2 = 4567500 (P-1 stage 2)
B1 = 335514 (P-1 stage 1)
B1 = 232996 (P-1 stage 1)
B1 = 105000, B2 = 2283750 (P-1 stage 2)
B1 = 194164 (P-1 stage 1)
B1 = 161804 (P-1 stage 1)
B1 = 105000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (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: 2019-07-04T12:48:34+00:00